JP3376144B2 - Optical network device and optical transmission system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical network node configuration used in an optical communication network, and an operation / management and maintenance method of the optical network.

[0002]

2. Description of the Related Art When optical communication is used, the capacity of one optical transmission line can be increased due to the wide band property of light. However, if photoelectric conversion is performed on all the optical signals at a node on the way that is not related to the target node of the signal, the size of the device becomes large and the cost also increases. Therefore, an optical network that switches an optical signal as it is is attracting attention. By using the optical switch, it is possible to collectively switch large-capacity optical signals as they are and perform network reorganization and failure recovery.

Therefore, in the past, an optical network node device as shown in FIG. 41 (Shiragaki et al.
nference on Optical Commu
(Nication) Proceedings Volume 2, TuP
(See pages 5.3 and 153). A block diagram of the node configuration is shown in FIG. 41, and an example of the configuration of the optical switch network 4101 used in the node is shown in FIG.
Shown in. In FIG. 41, 4100 represents an optical cross-connect node. Reference numerals 4105 to 4110 are optical transmission lines connected to other nodes. 4102 is an SDH path digital cross-connect system, 4103, 410
4 is an end device (optical) of the transfer frame of SDH.
LineTerminators and Mult
iplexers). Reference numerals 4105 to 4110 are optical transmission lines connected to other nodes. An optical switch circuit network 4101 is shown in FIG. 4201-4
Reference numeral 224 is an 8 × 8 matrix optical switch configured using LiNbO ₃ , 4201 to 4264 are input terminals of the optical switch network, and 4401 to 4464 are output terminals of the optical switch network. Matrix optical switch 4201
An optical switch circuit network can be constructed by connecting the 4224 as shown in FIG.

The optical signals transmitted through the optical transmission lines 4106 and 4107 are switched by the optical switch circuit network 4101 as they are, and are connected to other nodes.
09, 4110. Thus node 410
At 0, the optical signal transmitted is not converted into an electric signal and is switched as it is and transmitted to another node, so that a large amount of optical signals can be collectively switched and a high speed network is realized. Disaster recovery can be performed. Further, since it is not necessary to time-demultiplex and switch a large-capacity optical signal, there is an advantage that the node device can be downsized.

[0005]

By using the above-described technique, it is possible to collectively switch a large-capacity optical signal as it is, to perform network reorganization and failure recovery, and to reduce the size of the node device. Can be expected. However, the optical transmission lines 4106 and 41
The optical signal transmitted through the node 07 is kept as an optical signal at the node 410.
Since 0 is passed, it is not possible to operate and manage the network related to the optical transmission lines 4106 and 4107 in the node 4100 with this node configuration as it is, and to exchange the maintenance information. In order to realize the operation / management of the network and the exchange of the maintenance information, for example, an optical transmission line dedicated to the transmission of the operation / management / maintenance information of the optical network must be separately prepared, which is not economical. In addition, in the node 4100 that passes the light as it is, an optical signal, an optical transmission line,
Optical switches and the like cannot be monitored at all times, and when a network failure occurs, the failure point cannot be determined immediately, so that efficient network operation, management, and maintenance cannot be performed.

[0006]

A first invention is an optical network device, which has an optical receiving means, an optical functional circuit means, an input end, a first output end and a second output end. An optical demultiplexing unit that connects an optical transmission line to the input end and separates light input to the input end into the first output end and the second output end; and operating and managing the network. And an information processing means for processing maintenance information, wherein the first output end of the light separating means is connected to the input end of the optical functional circuit means, and the second output end of the light separating means is the optical receiving means. It is characterized in that it is connected to the input end of the means and the output end of the light receiving means is connected to the input end of the information processing means.

A second aspect of the invention is the optical network device of the first aspect of the invention , wherein the optical demultiplexing means has a wavelength of light of a wavelength belonging to the first group and light of a wavelength belonging to the second group to the input end. When the split-multiplexed light is input, the light of the wavelength belonging to the first group is output to the first output end and the light of the wavelength belonging to the second group is output to the second output end. And

A third invention is an optical network device, which has an optical transmission means, an optical functional circuit means, a first input end, a second input end and an output end, and the optical transmission line has the output. Optical superimposing means connected to an end and outputting to the output end a superposition of the input light to the first input end and the input light to the second input end, and operation, management, and maintenance of the network. The optical function circuit means has an output end connected to a first input end of the light superimposing means, and an output end of the information processing means is connected to an input end of the optical transmitting means. And an output end of the light transmitting means is connected to a second input end of the light superimposing means.

A fourth invention is an optical network device, which has an input end, a first output end and a second output end, and an optical transmission line is connected to the input end and input to the input end. Light splitting means for splitting and outputting light to the first output end and the second output end, optical function circuit means, light transmitting means, light receiving means, first input end and first An optical transmission line having two input ends and an output end is connected to the output end, and the input light to the first input end and the input light to the second input end are overlapped with each other. Optical superimposing means for outputting to, and information processing means for processing network operation, management, and maintenance information, the first output end of the optical separating means is connected to the input end of the optical function circuit means, The output end of the optical function circuit means is connected to the first input end of the light superimposing means, and the light separating means is provided. The second output end is connected to the input end of the light receiving means, the output end of the light receiving means is connected to the input end of the information processing means, and the output end of the information processing means is the input of the light transmitting means. And an output end of the transmitting means is connected to a second input end of the superimposing means.

A fifth aspect of the present invention is an optical network device, which has an input end, a first output end, and a second output end, and an optical transmission line is connected to the input end and input to the input end. Light separating means for separating and outputting light to the first output end and the second output end, an optical functional circuit means, an optical transmitting means, an optical receiving means, a first input end and a first input end An optical superimposing means which has two input terminals and an output terminal and which superimposes the input light to the first input terminal and the input light to the second input terminal to the output terminal; And an information processing means for processing operation, management, and maintenance information, wherein a first output end of the light separating means is connected to a first input end of the light superimposing means, and an output end of the light superimposing means is The second output terminal of the light separating means is connected to the input terminal of the optical function circuit means, and the second output terminal of the light separating means is connected to the input terminal of the light receiving means. Connected to the input end of the optical receiving means, the output end of the optical receiving means is connected to the input end of the information processing means, the output end of the information processing means is connected to the input end of the optical transmitting means, and the output end of the transmitting means is It is characterized in that it is connected to the second input end of the superposing means.

A sixth aspect of the present invention is an optical network device, which has an input end, a first output end, and a second output end, and transmits light that is input to the input end to the first output end and the first output end. It has an optical separating means for separating and outputting to a second output end, an optical functional circuit means, an optical transmitting means, an optical receiving means, a first input end, a second input end and an output end. An optical superimposing means for connecting an optical transmission line to the output end and superimposing the input light to the first input end and the input light to the second input end to the output end; And an information processing means for processing operation, management, and maintenance information, wherein the output end of the optical functional circuit means is connected to the input end of the light separating means, and the first output end of the light separating means is the optical output means. The second input end of the light splitting means is connected to the first input end of the superimposing means, and the second output end of the light separating means is input to the light receiving means. Connected to the input end of the optical receiving means, the output end of the optical receiving means is connected to the input end of the information processing means, the output end of the information processing means is connected to the input end of the optical transmitting means, and the output end of the transmitting means is It is characterized in that it is connected to the second input end of the superposing means.

A seventh invention is the optical network device according to the first invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

An eighth aspect of the present invention is the optical network device according to the second aspect of the present invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A ninth invention is the optical network device according to the third invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, the optical function circuit means being composed of a plurality of optical switches. It is a switch network.

A tenth aspect of the present invention is the optical network device according to the fourth aspect of the present invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

An eleventh aspect of the invention is the optical network device according to the fourth aspect of the invention , wherein the optical demultiplexing means has a wavelength of light of a wavelength belonging to the first detail and light of a wavelength belonging to the second group to the input end. When split-multiplexed light is input, light having a wavelength belonging to the first group is output to the first output end, light having a wavelength belonging to the second group is output to the second output end, and the light It is characterized in that the transmitting means sends out light having a wavelength not belonging to the first group, and the optical receiving means is capable of receiving light having a wavelength belonging to the second group.

A twelfth aspect of the invention is the optical network device according to the fifth aspect of the invention , wherein the optical demultiplexing means has a wavelength of light of a wavelength belonging to the first group and light of a wavelength belonging to the second group to the input end. When split-multiplexed light is input, light having a wavelength belonging to the first group is output to the first output end, light having a wavelength belonging to the second group is output to the second output end, and the light It is characterized in that the transmitting means transmits light of a wavelength not belonging to the first group, and the light receiving means is capable of receiving light of a wavelength belonging to the second group.

A thirteenth invention is the optical network device according to the sixth invention , wherein the optical demultiplexing means has a wavelength of light of a wavelength belonging to the first group and light of a wavelength belonging to the second group to the input end. When split-multiplexed light is input, light having a wavelength belonging to the first group is output to the first output end, light having a wavelength belonging to the second group is output to the second output end, and the light It is characterized in that the transmitting means sends out light having a wavelength not belonging to the first group, and the optical receiving means is capable of receiving light having a wavelength belonging to the second group.

A fourteenth invention is the optical network device according to the eleventh invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A fifteenth aspect of the present invention is a network operation, management, and maintenance information transmission system for transmitting an optical signal having a wavelength belonging to the first group to a second optical network device by using an optical transmission line. In the transmission method of network operation, management, and maintenance information from the first optical network device to the second optical network device, the first optical network device has network operation, management, and maintenance information. An optical signal having a wavelength belonging to the second group is generated, and an optical signal obtained by superposing the optical signal belonging to the second group and the optical signal belonging to the first group is transmitted using the optical transmission line, The second optical network device extracts an optical signal belonging to the second group from the transmitted optical signals and receives the optical signal belonging to the second group by using the optical receiving means, and the optical network device Operation, pipe , And wherein the obtaining maintenance information.

A sixteenth invention is a network operation, management and maintenance information transmission system of the fifteenth invention ,
It is characterized in that the first optical network device and the second optical network device are optical switch circuit networks configured by using a plurality of optical switches and having a plurality of input ends and a plurality of output ends.

A seventeenth aspect of the present invention is an optical network device comprising optical functional circuit means, an input end, a first output end, and a second output end.
And an optical transmission line that is connected to the first output end and that separates the light input to the input end into the first output end and the second output end, and outputs the separated light. Means, an optical receiving means, and an information processing means for processing network operation, management, and maintenance information, the output end of the optical functional circuit means being connected to the input end of the optical separation means, and the optical separation means. The second output end of the means is connected to the input end of the light receiving means, and the output end of the light receiving means is connected to the input end of the information processing means.

An eighteenth invention is the optical network device according to the seventeenth invention , wherein the optical demultiplexing means is connected to the input end of the first network.
When the wavelength division multiplexed light of the light of the wavelength belonging to the group and the light of the wavelength belonging to the second group is input, the light of the wavelength belonging to the first group is output to the first output end and the second group is output. Is output to the second output terminal, and the light receiving means is capable of receiving light having a wavelength belonging to the second group.

A nineteenth invention is an optical network device, which has an optical transmission means, an optical function circuit means, a first input end, a second input end, and an output end, and the optical transmission line is the above-mentioned. Optical superimposing means connected to one input end and outputting to the output end a superposition of the input light to the first input end and the input light to the second input end, and operation and management of the network. , And an information processing means for processing maintenance information, the output end of the information processing means is connected to the input end of the light transmitting means, and the output end of the light transmitting means is the second input of the light superimposing means. And an output end of the light superimposing means is connected to an input end of the optical function circuit means.

A twentieth aspect of the present invention is an optical network device, which comprises an optical functional circuit means, an input end, a first output end, and a second output end.
And an optical transmission line connected to the first output end for separating the light input to the input end into the first output end and the second output end for output. Means, light receiving means, light transmitting means, a first input end, a second input end, and an output end, and an optical transmission line is connected to the first input end to the first input end. And an information processing means for processing network operation, management, and maintenance information, the optical superposition means for outputting to the output end a superposition of the input light of and the input light to the second input end, The output end of the light superimposing means is connected to the input end of the optical function circuit means, the output end of the optical function circuit means is connected to the first input end of the light separating means, and the second end of the light separating means. Is connected to the input end of the light receiving means, and the output end of the light receiving means is connected to the information processing means. An output end of the information processing means is connected to an input end of the tail light transmitting means, and an output end of the light transmitting means is connected to a second input end of the light superimposing means. Characterize.

A twenty-first aspect of the invention is an optical network device according to the twentieth aspect of the invention , wherein the optical demultiplexing means has a first input to the input end.
When wavelength division multiplexed light of wavelengths belonging to the group and wavelengths belonging to the second group is input, the wavelengths belonging to the first group are output to the first output end and the second group is output. Is output to the second output terminal, and the light transmitting means sends out light having a wavelength belonging to the second group.

A twenty-second aspect of the invention is the optical network device of the seventeenth aspect , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, the optical function circuit means being configured by using a plurality of optical switches. It is a switch network.

A twenty-third invention is the optical network device according to the eighteenth invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A twenty-fourth invention is the optical network device according to the nineteenth invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A twenty-fifth invention is the optical network device according to the twentieth invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A twenty-sixth invention is the optical network device according to the twenty-first invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A twenty-seventh aspect of the present invention is a monitoring system for an optical network device, wherein an optical signal having a wavelength belonging to the first group of wavelengths is passed as it is from an input end to an output end without being converted into an electric signal. In the monitoring method of the optical network device, the optical signal of the wavelength belonging to the second group is generated,
An optical signal obtained by superimposing an optical signal belonging to a group and an optical signal having a wavelength belonging to the first group is input to the optical network device,
An optical signal belonging to the second group is extracted from the superimposed optical signal output from the optical network device,
Receiving optical signals of wavelengths belonging to the group using the optical receiving means,
It is characterized by obtaining monitoring information of the optical network.

A twenty-eighth invention is a monitoring system for an optical network device according to the twenty-seventh invention , wherein the optical network device comprises a plurality of optical switches and has a plurality of input terminals and a plurality of output terminals. It is characterized by an optical switch circuit network.

A thirty-ninth aspect of the invention is an optical network apparatus, which has an input end, a first output end, and a second output end, and an optical transmission line is connected to the input end and input to the input end. The first light splitting means for splitting and outputting light to the first output end and the second output end, and the first input end, the second input end, and the output end are provided. First light superimposing means for outputting to the output end a superposition of the input light to the input end and the input light to the second input end, and an optical functional circuit means,
The first light transmitting means, the second light transmitting means, the first light receiving means, the second light receiving means, the input end, the first output end, and the second output end. Second light separating means for separating the light input to the input end into the first output end and the second output end, and outputting the first input end, the second input end and the output end And an optical transmission line connected to the output end, and outputting a combination of the input light to the first input end and the input light to the second input end to the output end. The superimposing means, and the information processing means having at least a first input end, a second input end, a first output end, and a second output end for processing network operation, management, and maintenance information,
A first output end of the first light splitting means is connected to a first input end of the first light superimposing means, and an output end of the first light superimposing means is an input end of the optical function circuit means. Connected to the
The output end of the optical function circuit means is connected to the input end of the second light separation means, and the first output end of the second light separation means is the first input end of the second light superposition means. Connected to the
The second output end of the first light separating means is connected to the input end of the first light receiving means, and the output end of the first light receiving means is connected to the first input end of the information processing means. Connected, the first output end of the information processing means is connected to the input end of the first light transmitting means, and the output end of the first light transmitting means is the second end of the second light superimposing means. An input end is connected, a second output end of the information processing means is connected to an input end of the second light transmitting means, and an output end of the second light transmitting means is connected to the first light superimposing means. A second input end is connected, a second output end of the second light separating means is connected to an input end of the second light receiving means, and an output end of the second light receiving means is the information. It is characterized in that it is connected to the second input end of the processing means.

A thirtieth invention is the optical network device according to the twenty-ninth invention , wherein the first light demultiplexing means supplies the light of the wavelength belonging to the first group and the light of the wavelength belonging to the second group to the input end. When the wavelength division multiplexed light with is input, the light of the wavelength belonging to the first group is output to the first output end, and the light of the wavelength belonging to the second group is output to the second output end. A wavelength belonging to the first group when the second light demultiplexing means inputs the wavelength division multiplexed light of the light of the wavelength belonging to the first group and the light of the wavelength belonging to the third group to the input end. Is output to the first output end, light having a wavelength belonging to the third detail is output to the second output end, and the first light transmitting means outputs light having a wavelength belonging to the third group. The second light transmitting means sends out light of a wavelength not belonging to the first group, and the first light receiving means sends to the second group. Receiving light of a wavelength are possible,
The second light receiving means is capable of receiving light of a wavelength belonging to the third group.

A thirty- first invention is the optical network device according to the first invention , characterized in that the optical demultiplexing means is an optical branching means for branching the optical power.

A thirty-second invention is the optical network device according to the first invention , characterized in that the optical receiving means is an optical receiving means for demodulating subcarriers preliminarily superposed on the optical signal.

A thirty-third invention is the optical network device according to the thirty-first invention , characterized in that the optical receiving means is an optical receiving means for demodulating subcarriers preliminarily superposed on the optical signal.

A thirty-fourth invention is the optical network device according to the thirty-first invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, the optical functional circuit means being composed of a plurality of optical switches. It is a switch network.

A thirty-fifth aspect of the present invention is the optical network device according to the thirty-second aspect of the present invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, the optical function circuit means being configured using a plurality of optical switches. It is a switch network.

A thirty-sixth aspect of the invention is an optical network device according to the thirty-third aspect of the invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is constructed by using a plurality of optical switches. It is a switch network.

A thirty-seventh aspect of the present invention is a network continuous, management, and maintenance information transmission system, wherein the first optical network device transmits an optical signal to the second optical network device by using an optical transmission line. In a transmission method of network operation, management, and maintenance information to a second optical network apparatus, the first optical network apparatus is a subcarrier modulated to have network operation, management, and maintenance information. Is added and transmitted using the optical transmission line,
The optical network device of, extracts the subcarrier from the transmitted optical signal, demodulates the operation, management, and maintenance information of the network to obtain the operation, management, and maintenance information of the network. To do.

A thirty-eighth invention is a network operation, management, and maintenance information transmission system according to the thirty-seventh invention .
It is characterized in that the first optical network device and the second optical network device are optical switch circuit networks configured by using a plurality of optical switches and having a plurality of input ends and a plurality of output ends.

A thirty-ninth invention is a network operation, management and maintenance information transmission system according to the thirty-seventh invention , wherein the network operation, management and maintenance information is an identifier for a route through which an optical signal passes. It is characterized by

A fortieth aspect of the present invention is a network operation, management, and maintenance information transmission method according to the thirty-eighth aspect of the present invention , wherein the network operation, management, and maintenance information is an identifier for a route through which an optical signal passes. It is characterized by

The forty-first invention is an optical network device, which has an input end, a first output end and a second output end, and an optical transmission line is connected to the input end and input to the input end. The first light splitting means for splitting and outputting light to the first output end and the second output end, and the input end having an input end, a first output end and a second output end Second light splitting means for splitting the light input to the first output end and the second output end and outputting the split light; and a first input end, a second input end and an output end. A first light superimposing means for outputting to the output end, a first light superimposing means for holding a mixture of the input light to the first input end and the input light to the second input end, Light transmitting means, second light transmitting means, first light receiving means, second light receiving means, third light receiving means, input end, first output end, and Third light splitting means for splitting and outputting the light input to the input end to the first output end and the second output end, and the first input end and the An optical transmission line having two input ends and an output end is connected to the output end, and the input light to the first input end and the input light to the second input end are overlapped with each other. A second optical superimposing means for outputting to, a network having at least a first input end, a second input end, a third input end, a first output end and a second output end; And an information processing means for processing maintenance information, wherein a first output end of the first light separating means is connected to an input end of the third light separating means, and a first output end of the third light separating means is connected. An output end of the first optical superimposing means is connected to a first input end of the first optical superimposing means, and an output end of the first light superimposing means is the optical functional circuit means. It is connected to an input end, the output end of the optical function circuit means is connected to the input end of the second light splitting means, and the first output end of the second light splitting means is the second light superimposing means. Is connected to a first input end of the first optical separation means, a second output end of the first light separating means is connected to an input end of the first light receiving means, and an output end of the first light receiving means is The first input end of the information processing means is connected, the first output end of the information processing means is connected to the input end of the first optical transmission means, and the output end of the first optical transmission means is The second light superimposing means is connected to the second input end, the information processing means has a second output end connected to the second light transmitting means input end, and the second light transmitting means output. The end is connected to the second input end of the first light superimposing means, and the second output end of the second light separating means is the second optical receiver. Connected to the input end of the stage, the output end of the second light receiving means is connected to the second input end of the information processing means, and the output end of the third light superimposing means is the third light receiving means. It is characterized in that it is connected to the input end of the means and the output end of the third light receiving means is connected to the third input end of the information processing means.

A forty-second invention is the optical network device according to the forty-first invention , in which the first optical demultiplexing means applies to the input end light of a wavelength belonging to the first group and light of a wavelength belonging to the second group. When the wavelength division multiplexed light with is input, the light of the wavelength belonging to the first group is output to the first output end, and the light of the wavelength belonging to the second group is output to the second output end. A wavelength belonging to the first group when the second light demultiplexing means inputs the wavelength division multiplexed light of the light of the wavelength belonging to the first group and the light of the wavelength belonging to the third group to the input end. Light to the first output end, light having a wavelength belonging to the third detail to the second output end, and light having a wavelength not belonging to the first group by the first light transmitting means. Is transmitted, the second light transmitting means transmits light having a wavelength belonging to the third group, and the first light receiving means is transmitted to the second group. Receiving light of a wavelength are possible,
The second light receiving means is capable of receiving light of a wavelength belonging to the third group, the third light separating means is a light branching means, and the third light receiving means converts the light signal into an optical signal in advance. The optical receiving means demodulates the superimposed subcarriers.

A forty-third aspect of the present invention is an optical network apparatus, which has an input end, a first output end, and a second output end, and an optical transmission line is connected to the input end and input to the input end. The first light splitting means for splitting and outputting light to the first output end and the second output end, and the input end having an input end, a first output end and a second output end Second light splitting means for splitting the light input to the first output end and the second output end and outputting the split light; and a first input end, a second input end and an output end. A first light superimposing means for outputting to the output end, a first light superimposing means for holding a mixture of the input light to the first input end and the input light to the second input end, Light transmitting means, second light transmitting means, first light receiving means, second light receiving means, third light receiving means, input end, first output end, and Third light splitting means for splitting and outputting the light input to the input end to the first output end and the second output end, and the first input end and the An optical transmission line having two input ends and an output end is connected to the output end, and the input light to the first input end and the input light to the second input end are overlapped with each other. A second optical superimposing means for outputting to, a network having at least a first input end, a second input end, a third input end, a first output end and a second output end; And an information processing means for processing maintenance information, the first output end of the first light separating means is connected to the first input end of the first light superimposing means, and the first light superimposing means is provided. The output end of the means is connected to the input end of the optical functional circuit means, and the output end of the optical functional circuit means is the input end of the second optical separating means. Connected, a first output end of the second light splitting means is connected to an input end of the third light splitting means, and a first output end of the third light splitting means is connected to the second light splitting means. It is connected to a first input end of the superimposing means, a second output end of the first light separating means is connected to an input end of the first light receiving means, and an output end of the first light receiving means. Is connected to a first input end of the information processing means, a first output end of the information processing means is connected to an input end of the first optical transmission means, and an output end of the first optical transmission means Is connected to a second input end of the second light superimposing means, a second output end of the information processing means is connected to an input end of the second light transmitting means, and the second light transmitting means is connected. Is connected to the second input end of the first light superimposing means, and the second output end of the second light splitting means is connected to the second optical receiver. Connected to the input end of the stage, the output end of the second light receiving means is connected to the second input end of the information processing means, and the output end of the third light superimposing means is the third light receiving means. It is characterized in that it is connected to the input end of the means and the output end of the third light receiving means is connected to the third input end of the information processing means.

A forty-fourth invention is the optical network device according to the forty-third invention , wherein the first optical demultiplexing means supplies the light of the wavelength belonging to the first group and the light of the wavelength belonging to the second group to the input end. When the wavelength division multiplexed light with is input, the light of the wavelength belonging to the first group is output to the first output end, and the light of the wavelength belonging to the second group is output to the second output end. A wavelength belonging to the first group when the second light demultiplexing means inputs the wavelength division multiplexed light of the light of the wavelength belonging to the first group and the light of the wavelength belonging to the third group to the input end. Light of a wavelength belonging to the third group is outputted to the second output end, and light of a wavelength not belonging to the first group is outputted by the first light transmitting means. Is transmitted, the second light transmitting means transmits light of a wavelength belonging to the third group, and the first light receiving means is transmitted to the second group. Receiving light of a wavelength are possible,
The second light receiving means is capable of receiving light having a wavelength belonging to the third group, and the third light separating means is light branching means for branching the power of light, and the third light receiving means. It is characterized in that the means is an optical receiving means for demodulating subcarriers preliminarily superimposed on the optical signal.

A forty-fifth aspect of the present invention is the optical network device according to the third aspect of the present invention , wherein the optical transmission means is modulated by using a subcarrier on which the operation, management, and maintenance information of the network is pre-modulated. It is characterized by transmitting an optical signal.

A forty-sixth aspect of the present invention is an optical network device, which comprises optical functional circuit means, network operation and management,
And information processing means for processing maintenance information, modulator means for modulating an output signal of the information processing means, and an optical signal having an input end and an output end and inputted to the input end, the output of the modulator means It is composed of optical signal modulating means for modulating with a signal,
The output end of the optical signal modulating means is connected to the input end of the optical function circuit means, the output end of the information processing means is connected to the input end of the modulator means, and the output end of the modulator means is the optical end. It is characterized in that it is connected to a signal modulating means.

A forty-seventh aspect of the present invention is an optical network device, which comprises optical functional circuit means, network operation and management,
And information processing means for processing maintenance information, modulator means for modulating an output signal of the information processing means, and an optical signal having an input end and an output end and inputted to the input end, the output of the modulator means It is composed of optical signal modulating means for modulating with a signal,
The output end of the optical function circuit means is connected to the input end of the optical signal modulation means, the output end of the information processing means is connected to the input end of the modulator means, and the output end of the modulator means is the optical end. It is characterized in that it is connected to a signal modulating means.

A forty-eighth invention is an optical network device, which has an optical transmission means, an optical functional circuit means, a first input end, a second input end, and an output end, and the optical transmission line is the optical transmission line. Optical superimposing means connected to one input end and outputting to the output end a superposition of the input light to the first input end and the input light to the second input end, and operation and management of the network. , And an information processing means for processing maintenance information, the output end of the light superimposing means is connected to the input end of the optical function circuit means, and the output end of the information processing means is connected to the input end of the optical transmitting means. And an output end of the light transmitting means is connected to a second input end of the light superimposing means.

A forty-ninth invention is the optical network device according to the forty-fifth invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, the optical functional circuit means being composed of a plurality of optical switches. It is a switch network.

A fiftieth invention is the optical network device according to the forty-sixth invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, the optical functional circuit means being composed of a plurality of optical switches. It is a switch network.

The fifty-first invention is the optical network device according to the forty-seventh invention , wherein the optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A fifty-second invention is the optical network device according to the forty-eighth invention , wherein the optical functional circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is configured by using a plurality of optical switches. It is a switch network.

A fifty-third aspect of the present invention is an optical network device, wherein an optical functional circuit means having a plurality of input ends, an optical transmission line having an input end, a first output end and a second output end is provided. M light separating means connected to an input end and separating the light input to the input end into the first output end and the second output end; and m input ends and one Selecting means for selecting an optical signal input to one input terminal of the optical signals input to the m input terminals, an optical receiving means, and operation and management of the network, Information processing means for processing maintenance information, the first output end of the light separating means is connected to the input end of the optical functional circuit means, and the second output end of the light separating means is the selecting means. , And the output end of the selecting means is connected to the input end of the optical receiving means. Is continued, an output end of said light receiving means, characterized in that it is connected to an input terminal of said information processing means.

A fifty-fourth aspect of the present invention is an optical network device, wherein an optical functional circuit means having a plurality of input ends, an optical transmission line having an input end, a first output end and a second output end is provided. M pieces of light separating means connected to an input end and separating the light input to the input end into the first output end and the second output end, and m light receiving means, m input terminals and 1
Selecting means for selecting an electric signal input to one input terminal of the electric signals input to the m input terminals and processing operation, management and maintenance information of the network. And a second output end of the light separating means is connected to an input end of the optical functional circuit means, and a second output end of the light separating means is an input end of the light receiving means. And the output end of the light receiving means is connected to the input end of the selecting means, and the output end of the selecting means is connected to the input end of the information processing means.

A fifty-fifth aspect of the present invention is an optical network apparatus, which has optical transmitting means, one input end and m output ends, and branches light inputted to the input end into m output parts. An optical branching means for outputting to an optical function circuit means having a plurality of output ends, a first input end, a second input end and an output end, and an optical transmission line connected to the output end. Optical superimposing means for outputting to the output end a superposition of the input light to the input end and the input light to the second input end, and processing network operation, management and maintenance information. An information processing means, an output end of the optical functional circuit means is connected to a first input end of the light superimposing means, and an output end of the information processing means is connected to an input end of the optical transmitting means, The output end of the optical transmission means is connected to the input end of the optical branching means, The output end, characterized in that it is connected to the second input terminal of said optical superimposing means.

A fifty-sixth aspect of the present invention is an optical network apparatus, which has m optical transmitting means, one input end and m output ends, and branches an electric signal input to the input end into m branches. Branching means for outputting an electric signal to each output end, optical function circuit means having a plurality of output ends, first input end and second
An optical transmission line having an input end and an output end connected to the output end, the input light to the first input end and the input light to the second input end being superposed to the output end. It is composed of m optical superimposing means for outputting and information processing means for processing the operation, management and maintenance information of the network, and the output end of the optical functional circuit means is respectively connected to the first input end of the optical superimposing means. The output end of the information processing means is connected to the input end of the branching means, the output end of the branching means is connected to the input end of the optical transmitting means, and the output end of the optical transmitting means is the optical terminal. It is characterized in that they are respectively connected to the second input ends of the superposing means.

A fifty-seventh aspect of the present invention is an optical network device, wherein an optical functional circuit means having a plurality of input ends, an optical transmission line having an input end, a first output end and a second output end is provided. M light separating means connected to an input end and separating the light input to the input end into the first output end and the second output end; and m input ends and one Selecting means for selecting an optical signal input to one input terminal of the optical signals input to the m input terminals, an optical receiving means, an optical transmitting means, and And an optical branching means for branching the light input to the input end to each output end and outputting the light, and a first input end, a second input end and an output end. An optical transmission line is connected to the output end, and a combination of input light to the first input end and input light to the second input end is superposed on the output end. It comprises m optical superimposing means for outputting and information processing means for processing network operation, management, and maintenance information, and the first output end of the optical separating means is respectively at the input end of the optical functional circuit means. The second output terminals of the light separating means are connected to the input terminals of the selecting means, the output terminals of the selecting means are connected to the input terminals of the light receiving means, and the output terminals of the light receiving means are connected. Are connected to the input ends of the information processing means, the output ends of the optical function circuit means are connected to the first input ends of the light superimposing means, and the output ends of the information processing means are the inputs of the optical transmitting means. And an output end of the light transmitting means is connected to an input end of the light branching means, and an output end of the light branching means is connected to a second input end of the light superimposing means, respectively. And

A fifty-eighth invention is an optical network device, wherein an optical function circuit means having a plurality of input ends, an optical transmission line having an input end, a first output end and a second output end is provided. M pieces of light separating means connected to an input end and separating the light input to the input end into the first output end and the second output end, and m light receiving means, m input terminals and 1
Selecting means for selecting an electric signal inputted to one input terminal among the electric signals inputted to the m input terminals, and an optical transmitting means, and one input terminal. An optical branching unit having m output terminals, a first input terminal, a second input terminal and an output terminal, and an optical transmission line connected to the output terminal, input light to the first input terminal. And m light superimposing means for outputting to the output end a superposition of the input light to the second input end and information processing means for processing network operation, management and maintenance information, First of the light separating means
Output terminals of the optical function circuit means are respectively connected, second output terminals of the optical separating means are respectively connected to input terminals of the optical receiving means, and output terminals of the optical receiving means are selected. The input end of the means, the output end of the selection means is connected to the input end of the information processing means,
The output terminals of the optical function circuit means are respectively connected to the first input terminals of the light superimposing means, the output terminals of the information processing means are connected to the input terminals of the light transmitting means, and the output terminals of the light transmitting means. Is connected to the input end of the light branching means, and the output end of the light branching means is connected to the second input end of the light superimposing means, respectively.

A fifty-ninth aspect of the present invention is an optical network device, wherein an optical function circuit means having a plurality of input ends, an optical transmission line having an input end, a first output end and a second output end is provided. M light separating means connected to the input end and separating the light input to the input end into the first output end and the second output end; and m input ends and one Selecting means for selecting an optical signal input to one input terminal of the optical signals input to the m input terminals, an optical receiving means, one input terminal and m A plurality of output terminals, branching means for outputting to each output terminal an electrical signal obtained by m branching the electrical signal input to the input terminal, m optical transmitting means, a first input terminal and a second input terminal. An optical transmission line having an input end and an output end is connected to the output end, and input light to the first input end and input to the second input end Consists Doo and the m light superimposing means for outputting to the output terminal of which are superimposed, network operations, management, and information processing means for processing the maintenance information,
The first output terminals of the light separating means are connected to the input terminals of the optical function circuit means, and the second output terminals of the light separating means are connected to the input terminals of the selecting means, respectively. The output end is connected to the input end of the light receiving means, the output end of the light receiving means is connected to the input end of the information processing means, and the output end of the optical function circuit means is the first end of the light superimposing means. Connected to input ends, the output end of the information processing means is connected to the input end of the branching means, and the output end of the branching means is connected to the optical transmitting means, respectively.
The output terminals of the optical transmitter means are respectively connected to the output terminals of the optical superimposing means.

The 60th invention is the optical network equipment according to the 56th invention , which has one input end and m output ends, and outputs an electric signal obtained by m branching the electric signal input to the input end. An optical transmission line having branching means for outputting to each output terminal, m optical transmitting means, a first input terminal, a second input terminal and an output terminal is connected to the output terminal. M light superimposing means for outputting a superposition of the input light to the input end and the input light to the second input end to the output end are added, and the output end of the optical function circuit means is the optical end. The optical transmitter means is connected to the first input terminal of the superimposing means, the output terminal of the information processing means is connected to the input terminal of the branching means, and the output terminal of the branching means is connected to the optical transmitting means. Are connected to the output ends of the light superimposing means, respectively.

A sixty-first invention is a network operation, management and maintenance information transmission system, wherein m optical transmission lines are used for an optical signal having a wavelength belonging to the first group to a second optical network device. In a transmission method of network operation, management, and maintenance information from a first optical network device to a second optical network device, the first optical network device includes: And optical signals of wavelengths belonging to the second group of m having maintenance information, and transmitted to the respective m optical transmission lines and the optical signals of wavelengths belonging to the second group of m. The optical signals superposed with the optical signals of the wavelengths belonging to the first group are respectively transmitted using the m optical transmission lines, and the second optical network device uses the m optical transmission lines. The weight that has been transmitted The optical signal is extracted, respectively belonging to the inner said second group of optical signals, the second, which is the m extraction
It is characterized in that one of the optical signals of the wavelengths belonging to the group is received as an effective optical signal to obtain operation, management and maintenance information of the network.

A sixty-second invention is a network continuous, management and maintenance information transmission system, wherein m optical transmission lines are used for optical signals of wavelengths belonging to the first group to the second optical network device. In a transmission method of network operation, management, and maintenance information from a first optical network device to a second optical network device, the first optical network device includes: And an optical signal having a wavelength belonging to the second group, which has maintenance information, and selects one of the m optical transmission lines,
An optical signal obtained by superimposing an optical signal of a wavelength belonging to the second group and an optical signal of a wavelength belonging to the first group transmitted in the selected one optical transmission line on the one optical transmission line. And the second optical network device is
An optical signal having a wavelength belonging to the second group is extracted from the superposed optical signals transmitted using the optical transmission line of the book, and the extracted optical signal having a wavelength belonging to the second group is received by an optical receiving unit. It is characterized in that it is received by using and obtains operation, management and maintenance information of the network.

A 63rd invention is a network operation, management and maintenance information transmission system according to the 61st invention .
In the second optical network device, one separate optical signal is selected at different times.

[0069] invention of a 64 network operations of the invention of a 62, a transmission method of administration, and maintenance information,
In the first optical network device, one separate optical transmission line is selected at different times.

A sixty-fifth aspect of the present invention is a network operation, management, and maintenance information transmission method according to the sixty-first aspect of the invention .
When a reception failure of an optical signal of a wavelength belonging to the selected second group occurs in the second optical network device, the second optical network device switches the other optical transmission line. It is characterized in that an optical signal of a wavelength belonging to the second group which is being transmitted is automatically selected.

[0071] invention of a 66 network operations of the invention of a 62, a transmission method of administration, and maintenance information,
When a failure occurs in the selected one optical transmission line, an optical transmission line that transmits an optical signal of a wavelength belonging to the second group is changed from the selected one optical transmission line to another optical transmission line. It is characterized by automatically switching to the transmission line.

A sixty-seventh aspect of the present invention is an optical network device, which comprises optical functional circuit means, an input end, a first output end, and a second output end.
And an input end connected to an optical transmission line connected to another node, and a first output end connected to an optical functional circuit means which is a target of operation / management / maintenance of the optical network. Alternatively, the first output end is connected to an optical transmission line connected to another node, and the input end is connected to the optical function circuit means to input light input to the input end to the first output end. And m second optical separating means for separating and outputting to a second output end, and an optical transmission line having an input end, a first output end and a second output end, and being connected to the input end. M second light splitting means for splitting and outputting the light input to the input end to the first output end and the second output end, m input ends and one output Selecting means for selecting a signal input to one of the optical signals input to the m input terminals having an end, The optical signal determining means for determining the state of each optical signal, the optical receiving means, and the information processing means for processing information on operation / management / maintenance of the optical network having a plurality of input terminals, Second output terminals of the light separating means are connected to input terminals of the second light separating means, and second output terminals of the second light separating means are connected to input terminals of the optical signal determining means. The output end of the optical signal determining means is connected to the input end of the information processing means, and the first output end of the second optical separating means is connected to the input end of the selecting means. An output end of the selecting means is connected to an input end of the light receiving means, and an output end of the light receiving means is connected to an input end of the information processing means.

A sixty-eighth aspect of the present invention is an optical network device, which comprises an optical functional circuit means, an input end, a first output end, and a second output end.
Output terminal of the second input node is connected to an optical transmission line to which the input terminal is connected to another node and the first output terminal is connected to the optical function circuit means, or the first output terminal is connected to another node. Is connected to an optical transmission line connected to the optical transmission line and the input end is connected to the optical function circuit means to separate the light input to the input end into the first output end and the second output end. Operation, management, and maintenance of a first network that has an output optical separation unit, an optical reception unit, an input end, a first output end, and a second output end, and that communicates in advance according to the first group protocol. When a signal in which a signal having information and a signal having operation, management, and maintenance information of a second network that communicates according to a second group protocol are time-division-multiplexed is input to an input end, the first network Signals with operational, management, and maintenance information Information separating means for outputting information to the first output end and information of a signal having operation, management and maintenance information of the second network to the second output end, and the protocol of the first group. A first group of protocol processing means for performing processing, a second group of protocol processing means for performing protocol processing of the second group, and a network operation and management having a first input end and a second input end, And an information processing means for processing maintenance information, the second output end of the light separating means is connected to the input end of the light receiving means, and the output end of the light receiving means is connected to the information separating means. ,
A first output terminal of the information separating means is connected to an input terminal of the protocol processing means of the first group, and a second output terminal of the information separating means is connected to an input terminal of the protocol processing means of the second group. The output end of the protocol processing means of the first group is connected to the first input end of the information processing means, and the output end of the protocol processing means of the second group is the second input end of the information processing means. It is connected to.

A 69th aspect of the invention is an optical network apparatus according to the 68th aspect of the invention , in which the first network is operated.
Signals that have management and maintenance information are digital signals,
The first group of protocol processing means is a protocol processing means for processing a protocol in which the relative position of bits on the time axis of the digital signal and the value of the bits are operation, management, and maintenance information of the network. It is characterized by being.

A 70th aspect of the present invention is an optical network device, which has an optical functional circuit means, a first input end, a second input end, and an output end, and the first input end is connected to another node. Connected to the optical transmission line and the output end is connected to the optical functional circuit means, or the output end is connected to an optical transmission line connected to another node and the first input end is the optical transmission line. Optical superimposing means connected to the functional circuit means for outputting to the output end a superposition of the input light to the first input end and the input light to the second input end; It has a first group of protocol processing means for performing a first group of protocol processing, a second group of protocol processing means for performing a second group of protocol processing, a first input end, a second input end and an output end. Operation of a first network that communicates according to the first group of protocols A signal having operation, management and maintenance information of a second network which inputs a signal having management and maintenance information to the first input terminal and communicates according to the protocol of the second group, has a signal having the second input terminal. And outputs to the output end a signal in which the signal having the operation, management and maintenance information of the first network and the signal having the operation, management and maintenance information of the second network are time-division multiplexed. And an information processing means for processing network operation, management, and maintenance information having a first output terminal and a second output terminal, wherein the first output terminal of the information processing means is The second group of protocol processing means is connected to the input terminal of the first group of protocol processing means, and the second output terminal of the information processing means is connected to the input terminal of the second group protocol processing means. output Is connected to the first input end of the information superimposing means, the output end of the protocol processing means of the second group is connected to the second input end of the information superimposing means, and the output end of the information superimposing means is the above-mentioned It is characterized in that it is connected to an input end of the light transmitting means, and an output end of the light transmitting means is connected to a second input end of the light superimposing means.

A seventy-first invention is the optical network device according to the seventy invention , wherein the first network is operated.
Signals that have management and maintenance information are digital signals,
The first group of protocol processing means is a protocol processing means for processing a protocol in which the relative position of bits on the time axis of the digital signal and the value of the bits are operation, management, and maintenance information of the network. It is characterized by being.

A 72nd aspect of the invention is an optical network device, comprising optical function circuit means, an input end, a first output end, and a second output end.
Output terminal of the second input node is connected to an optical transmission line to which the input terminal is connected to another node and the first output terminal is connected to the optical function circuit means, or the first output terminal is connected to another node. Is connected to an optical transmission line connected to the input terminal and the input end is connected to the optical function circuit means, and the light input to the input end is separated and output to the first output end and the second output end. Which has m light separating means, m input terminals and one output terminal, and the optical signal input to one of the m input terminals is electrically A first optical communication unit that has a selection light receiving unit that outputs a signal converted into a signal and an input end and an output end from a first output end to a (m + 1) th output end and that performs communication in advance according to a protocol of the first group. Communicates with signals that carry information on the operation, management, and maintenance of existing networks and protocols of the second group The operation, management, and maintenance information of the first network is input when a signal that is time-division-multiplexed with a signal having the operation, management, and maintenance information of the m second group networks is input to the input terminal. The information of the signal that it has is output to the (m + 1) th output end, and the information of the signal that has the operation, management, and maintenance information of the second group of networks is output from the first output end to the mth output end. Information separating means for outputting respectively, first group protocol processing means for performing the first group protocol processing, m second group protocol processing means for performing the second group protocol processing, and network operation , An information processing means for processing management and maintenance information, the second output end of the light separating means is connected to the input end of the selective light receiving means, and the output end of the selective light receiving means is Information Connected to an input end of the means, the (m + 1) th output end of the information separating means is connected to an input end of the protocol processing means of the first group, and the (m + 1) th output end of the information separating means is connected to the m-th output terminal. Up to the output terminal, the m-th protocol processing means of the second group are connected to the input terminals, respectively, and the output terminals of the protocol processing means of the first group are connected to the input terminals of the information processing means. An output end of the protocol processing means of the second group is connected to an input end of the information processing means, respectively.

The 73rd invention is the optical network device according to the 72nd invention , wherein the signal having the operation, management and maintenance information of the network of the second group is a digital signal, and the protocol of the second detailed description. The processing means is a protocol processing means for processing a protocol in which the relative position of the bit on the time axis of the digital signal and the value of the bit are operation, management, and maintenance information of the network. .

The seventy-fourth invention is an optical network device, which has one input end and m output ends, and when the signal is input to the input end, the signal is converted into an optical signal. An optical branching / transmitting means for outputting an optical signal to each of the m output terminals, an optical functional circuit means having a plurality of output terminals, a first input terminal, a second input terminal and an output terminal are provided. 1 has an input end connected to an optical transmission line connected to another node and the output end connected to the optical function circuit means, or the output end connected to an optical transmission line connected to another node, and The first input end is connected to the optical function circuit means, and the number m of the input light to the first input end and the input light to the second input end superimposed on each other are output to the output end. Optical superimposing means, and first group protocol processing means for performing first group protocol processing, It has m second group protocol processing means for performing the second group protocol processing, and has the first input end to the (m + 1) th input end and the output end, and communicates by the first group protocol. The signal having the operation, management and maintenance information of the first network is transmitted to the (m + 1) th signal.
From the first input terminal to the m-th input terminal, the signals having operation, management, and maintenance information of m second-group networks that are input to the input terminals of the second group and communicate according to the second group protocol. And a signal having the operation, management, and maintenance information of the first network and a signal having the operation, management, and maintenance information of the m second group networks are time-division multiplexed. The information superimposing means for outputting to the output end, and the information processing means for processing the operation, management and maintenance information of the network, the output end of the information processing means is the input end of the protocol processing means of the first group. The m-th protocol processing means of the second group are respectively connected to the input terminals, and the output terminals of the protocol processing means of the first group are connected to the (m + 1) th input terminal of the information superimposing means, The output ends of the protocol processing means of the second group are respectively connected from the first input end to the m-th input end of the information superimposing means, and the output end of the information superimposing means is connected to the input end of the optical branching and transmitting means. And an output end of the light transmitting means is connected to a second input end of the light superimposing means, respectively.

A 75th invention is the optical network device according to the 74th invention , wherein the signal having operation, management and maintenance information of the network of the second group is a digital signal, and the protocol of the second group. The processing means is a protocol processing means for processing a protocol in which the relative position of the bit on the time axis of the digital signal and the value of the bit are operation, management, and maintenance information of the network. ..

The 76th aspect of the present invention is an optical network device, comprising optical functional circuit means, an input end, a first output end, and a second output end.
And an optical transmission line having an output end connected to another node and connected to the input end and the optical functional circuit means connected to the first output end or connected to another node. Is connected to the output end and the optical function circuit means is connected to the first output end to separate the light input to the input end into the first output end and the second output end. The optical separation means for outputting, the optical receiving means, the information processing means for processing the operation, management, and maintenance information of the network, the first input terminal, the second input terminal, and the output terminal, A signal superimposing unit that outputs a signal obtained by superimposing a signal input to an input end and a signal input to the second input end to the output end, a signal output device, and the optical function circuit unit having an output end. Optical transmission means connected to any of the optical transmission lines, The second output end of the means is connected to the input end of the light receiving means, the output end of the light receiving means is connected to the input end of the information processing means, and the output end of the information processing means is the signal superimposing means. Is connected to a second input end of the signal generating device, an output end of the signal generating device is connected to a first input end of the signal superimposing means, and an output end of the signal superimposing means is connected to an input end of the optical transmitting means. It is characterized by

A seventy-seventh aspect of the present invention is an optical network device, which comprises an optical functional circuit means, and an optical receiving means to which either an optical transmission line connected to another node or an output end of the optical functional circuit means is connected. A signal separating means having an input end, a first output end, and a second output end, for separating the signal input to the input end into the first output end and the second output end, and outputting the signal. And a signal input means, an information processing means for processing network operation, management, and maintenance information, and a first input terminal, a second input terminal, and an output terminal, which are input to the first input terminal. Signal superimposing means for outputting a signal obtained by superimposing a signal input to the second input terminal to the output terminal, a signal output means, an optical transmission line connected to another node, or the optical function circuit. The optical transmitting means connected to any one of the input ends of the means; And an output end of the optical receiving means is connected to an input end of the signal separating means, a first output end of the signal separating means is connected to the signal input means, and a second output of the signal separating means. An end is connected to the information processing means, an output end of the information processing means is connected to a second input end of the signal superimposing means, and an output end of the signal output means is a first input end of the signal superimposing means. And the output end of the signal superimposing means is connected to the optical transmitting means.

A 78th invention is the optical network device according to the 77th invention , wherein said optical function circuit means is an optical network device having a plurality of input terminals and a plurality of output terminals, which is constituted by using a plurality of optical switches. At least one optical transmission line for transmitting an optical signal, which is an electrical termination point of the optical network device, is connected to the input end, and the optical network device is connected to the output end. At least one optical transmission line that electrically transmits an optical signal serving as a terminal point is connected.

[0084]

The function of the present invention will be described below.

With regard to the first aspect of the present invention, an optical branching device or WDM (wavelength division division) is provided before an optical signal is input to the optical functional circuit means.
Multiplexing and Demulti
By inserting an optical separation means such as a coupler, a polarization splitter, or the like, information signals for operation, management, and maintenance of a network that has been preliminarily superimposed (hereinafter abbreviated as OAM signal, abbreviated as OAM: Operations, Administration).
(straight, and Maintenance)
Can be separated and extracted, and OAM information (OAM information
Signal information).

With regard to the second aspect of the invention, by inserting a means for separating the wavelength such as a WDM coupler before the optical signal is input to the optical functional circuit means, it is superimposed in advance on the wavelength different from the wavelength of the main signal. OAM signals can be separated and extracted, and OAM information can be obtained in an optical network device in which the main signal passes as light.

According to the third aspect of the present invention, after the optical signal is output from the optical function circuit means, the optical superimposing means is inserted to superimpose the OAM signal light on the main signal light and transmit it to another node. You can Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is to another optical network device.

With regard to the fourth aspect of the invention, before the optical signal is inputted to the optical function circuit means, an optical branching device, a WDM coupler,
By inserting a light splitting means such as a polarization splitter,
The pre-superimposed OAM signal can be separated and extracted. In addition, after the optical signal is output from the optical function circuit means, the optical superimposing means is inserted so that the OA is added to the main signal light.
The M signal light can be superimposed and transmitted to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

With regard to the fifth aspect of the present invention, an optical branching device, a WDM coupler, and
By inserting a light splitting means such as a polarization splitter,
The pre-superimposed OAM signal can be separated and extracted. Also, by inserting the optical superimposing means after the optical demultiplexing means, the OAM signal light can be superposed on the main signal light and transmitted to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

With respect to the sixth aspect of the invention, by inserting an optical branching device, a WDM coupler, a polarization splitter, or other optical separating means in the subsequent stage of the optical function circuit means, it is possible to preliminarily superimpose O.
The AM signal can be separated and extracted. Also, by inserting the optical superimposing means after the optical demultiplexing means, the OAM signal light can be superposed on the main signal light and transmitted to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

According to the seventh aspect of the invention, the OAM signal preliminarily superposed by inserting the optical splitter, the WDM coupler, the polarization splitter or the like before the optical signal is input to the optical switch network. Can be separated and extracted, and OAM information can be obtained in an optical network device through which the main signal passes as light.

According to the eighth aspect of the invention, by inserting a means for separating the wavelength such as a WDM coupler before the optical signal is input to the optical switch network, it is preliminarily superimposed on the wavelength different from the wavelength of the main signal. OAM signals can be separated and extracted, and OAM information can be obtained in an optical network device through which a main signal passes as light.

According to the ninth aspect of the invention, after the optical signal is output from the optical switch network, the optical superimposing means is inserted to superimpose the OAM signal light on the main signal light and transmit it to another node. You can Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is to another optical network device.

According to the tenth aspect of the present invention, before the optical signal is input to the optical switch network, an optical branching device, a WDM coupler, a polarization splitter, or other optical demultiplexing means is inserted, so that the OAM signal preliminarily superposed is inserted. Can be separated and extracted. In addition, after the optical signal is output from the optical function circuit means, the optical superimposing means is inserted so that O
The AM signal light can be superimposed and transmitted to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

According to the eleventh aspect of the present invention, by inserting a wavelength separating means such as a WDM coupler before the optical signal is input to the optical functional circuit means, the pre-superimposed OAM signal is separated and extracted. can do. Also, after the optical signal is output from the optical function circuit means, by inserting the optical superimposing means, it is possible to superimpose the OAM signal light on the main signal light and transmit it to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

With regard to the twelfth aspect, by inserting a wavelength separating means such as a WDM coupler before the optical signal is inputted to the optical functional circuit means, the pre-superimposed OAM signal is separated and extracted. can do. Also, by inserting the optical superimposing means after the optical demultiplexing means, the OAM signal light can be superposed on the main signal light and transmitted to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

With regard to the thirteenth invention, by inserting a wavelength separating means such as a WDM coupler in the subsequent stage of the optical function circuit means, it is possible to separate and extract the OAM signal superimposed in advance. Also, by inserting the optical superimposing means after the optical demultiplexing means, the OAM signal light can be superposed on the main signal light and transmitted to another node. Therefore, the OAM signal light can be transmitted from the optical network device through which the main signal passes as it is to another optical network device, and the OAM information can be obtained from the other optical network device.

According to the fourteenth invention, by inserting a wavelength separating means such as a WDM coupler before the optical signal is input to the optical switch network, the pre-superimposed OAM signal is separated and extracted. can do. Also, after the optical signal is output from the optical function circuit means, by inserting the optical superimposing means, it is possible to superimpose the OAM signal light on the main signal light and transmit it to another node. Therefore, it is possible to transmit the OAM signal light from the optical network device through which the main signal passes as it is to another optical network device,
OAM information can be obtained from other optical network devices.

With regard to the fifteenth invention, in the first optical network device, the OAM signal light can be superposed on the main signal light by using an optical coupler or the like in the first optical network device, and in the second optical network device. Therefore, the main signal light and the OAM signal light can be separated by using an optical branching device, a WDM coupler, or the like. Therefore, the main signal light passes through the first optical network device as it is, and the second main signal light passes through as it is.
The OAM signal can be transmitted to the optical network device.

With regard to the sixteenth invention, in the first optical network device constructed by using the optical switch network, the OAM signal is converted into the OAM signal as the main signal light by using the optical coupler or the like.
By superimposing the signal light, the OAM signal can be transmitted to another node. Second configuration using optical switch network
In the optical network device, the OAM signal can be extracted by separating the main signal light and the OAM signal light by using an optical branching device, a WDM coupler, or the like. Therefore, the OAM from the first optical network device through which the main signal light passes as it is to the second optical network device through which the main signal light passes as it is OAM
A signal can be transmitted.

With regard to the seventeenth aspect of the present invention, by using an optical branching device arranged at the subsequent stage of the optical function circuit means, a WDM coupler, an optical branching device such as a polarization splitter, etc., In the optical network equipment that can separate the OAM signal light and pass the main signal light as it is
AM information can be obtained.

With respect to the eighteenth invention, by using a wavelength separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means, the OAM signal light can be separated from the transmitted signal light. , OAM information can be obtained in an optical network device through which the main signal light passes as it is.

With regard to the nineteenth aspect of the invention, the OAM signal light can be superposed on the main signal light by using the optical superimposing means such as the optical coupler arranged in the preceding stage of the optical function circuit means, and the main optical signal can be superposed as it is. OAM information can be transmitted to another optical network device in the optical network device through which the signal light passes.

With regard to the twentieth aspect of the present invention, the supervisory signal light can be superposed on the main signal light by using the optical superimposing means such as the optical coupler arranged in the preceding stage of the optical function circuit means, and the optical function can be used. By using an optical separating means such as a WDM coupler arranged at the subsequent stage of the circuit means, the supervisory signal light can be extracted, and the optical functional circuit means in the optical network device through which the main signal light passes as it is. Can be monitored.

With regard to the twenty-first aspect, it is possible to superimpose the supervisory signal light of the second group of wavelengths on the main signal light by using an optical superimposing means such as an optical coupler arranged before the optical function circuit means. , A WD arranged at a stage subsequent to the optical functional circuit means
By using a wavelength separating means such as an M coupler, the supervisory signal light of the second group of wavelengths can be extracted, and the optical functional circuit means in the optical network device through which the main signal light passes as it is. Can be monitored.

With regard to the twenty-second aspect of the invention, an optical branching device, a WDM coupler, or the like, which is arranged in a subsequent stage of the optical switch circuit network,
By using an optical branching device such as a polarization splitter, OAM signal light can be separated from the transmitted signal light, and OAM information can be obtained in an optical network device through which the main signal light passes as it is. .

With regard to the twenty-third aspect of the invention, the OAM signal light can be separated from the transmitted signal light by using a wavelength separating means such as a WDM coupler arranged at the subsequent stage of the optical switch circuit network. , OAM information can be obtained in an optical network device through which the main signal light passes as it is.

With regard to the twenty-fourth invention, it is possible to superimpose the OAM signal light on the main signal light by using an optical superimposing means such as an optical coupler arranged in the preceding stage of the optical switch circuit network, and the main light is kept as it is. OAM information can be transmitted to another optical network device in the optical network device through which the signal light passes.

In the twenty-fifth aspect of the invention, the supervisory signal light can be superposed on the main signal light by using the optical superimposing means such as the optical coupler arranged in the preceding stage of the optical switch circuit network, and the optical function can be realized. WDM arranged after the circuit means
By using the optical separating means such as the coupler, the monitoring signal light can be extracted, and the optical functional circuit means can be monitored in the optical network device through which the main signal light passes as it is.

With regard to the twenty-sixth aspect, the supervisory signal light of the second group of wavelengths can be superposed on the main signal light by using an optical superimposing means such as an optical coupler arranged in the preceding stage of the optical switch circuit network. , W arranged at the latter stage of the optical functional circuit means
By using a wavelength separating means such as a DM coupler, the supervisory signal light of the second group of wavelengths can be extracted, and the optical functional circuit means in the optical network device through which the main signal light passes as it is. Can be monitored.

In the twenty-seventh aspect of the invention, by using an optical superimposing means such as an optical coupler arranged in front of the optical function circuit means, the main signal light of the first group of wavelengths can be used as the supervisory signal of the second group of wavelengths. It is possible to superimpose light, and it is possible to extract the supervisory signal light of the second group of wavelengths by using a wavelength separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means. The optical functional circuit means can be monitored in an optical network device through which the main signal light passes as it is.

With regard to the twenty-eighth aspect of the invention, by using an optical superimposing means such as an optical coupler arranged in the preceding stage of the optical switch network, the main signal light of the first group of wavelengths is used as the main signal light of the second group of wavelengths. It is possible to superimpose light, and it is possible to extract the supervisory signal light of the second group of wavelengths by using a wavelength separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means. The optical switch circuit network can be monitored in the optical switch circuit network through which the main signal light passes as it is.

With regard to the twenty-ninth invention, an OAM signal light transmitted from another optical network device is separated and extracted by using an optical separating means such as a WDM coupler arranged in the preceding stage of the optical function circuit means. can do. Moreover, by using the light superimposing means arranged in the next stage,
The supervisory signal light can be superimposed on the main signal light. Further, the supervisory signal light can be separated and extracted by using an optical separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means. Further, by using the optical superimposing means arranged in the next stage, the OAM signal to another optical network device can be superposed on the main signal light.
Therefore, the OAM signal light can be transmitted and received in the optical switch circuit network through which the main signal light passes as it is, and the optical switch circuit network can be monitored.

With regard to the thirtieth invention, a second group is used from an optical signal transmitted from another optical network device by using a wavelength separating means such as a WDM coupler arranged in front of the optical function circuit means. It is possible to separate and extract the OAM signal light of the wavelength belonging to. Further, by using the optical superimposing means arranged in the next stage, the supervisory signal light of the wavelength belonging to the third group can be superposed on the main signal light of the wavelength belonging to the first group. Further, by using a wavelength separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means, it is possible to separate and extract the supervisory signal light of the wavelength belonging to the third group. Further, by using the optical superimposing means arranged in the next stage, OAM signal light (light having a wavelength not belonging to the first group) to another optical network device can be superposed on the main signal light. . Therefore, in the optical switch network through which the main signal light passes as it is, OA
M signal light can be transmitted and received, and the optical switch circuit network can be monitored.

With regard to the thirty-first aspect of the invention, by inserting the optical branching means such as an optical branching device before the optical signal is inputted to the optical functional circuit means, the OAM: signal which has been superimposed in advance can be extracted. , OAM information can be obtained in an optical network device in which the main signal passes as light.

In the thirty-second aspect of the present invention, the optical demultiplexing means such as an optical branching device, a WDM coupler, and a polarization splitter is inserted before the optical signal is input to the optical function circuit means, so that the OAM signal preliminarily superposed is inserted. An optical network device capable of separating light, extracting an OAM signal by demodulating a subcarrier signal in which the OAM signal is modulated in advance from the obtained OAM signal light, and passing a main signal as light. At, the OAM information can be obtained.

With regard to the thirty-third invention, by inserting an optical branching means such as an optical branching device before an optical signal is inputted to the optical functional circuit means, OAM: signal light can be separated and obtained. The OAM signal can be extracted by demodulating the subcarrier signal in which the OAM signal is modulated from the OAM signal light in advance, and the OAM information can be obtained in the optical network device in which the main signal passes as light. it can.

With regard to the thirty-fourth invention, by inserting an optical branching means such as an optical branching device before the optical signal is input to the optical switch circuit network, it is possible to extract the OAM: signal which has been superimposed in advance. , OAM information can be obtained in an optical network device in which a main signal passes as light.

With regard to the thirty-fifth aspect of the invention, by inserting an optical branching device, a WDM coupler, a polarization splitter, or other optical separating means before being input to the optical switch circuit network, the OAM signal light that has been superimposed in advance is separated. In the optical network device, the OAM signal can be extracted by demodulating the subcarrier signal in which the OAM signal is modulated in advance from the obtained OAM signal light, and the main signal passes as light. OAM information can be obtained.

With regard to the thirty-sixth aspect of the present invention, by inserting an optical branching means such as an optical branching device before an optical signal is input to the optical switch circuit network, OAM: signal light can be separated and obtained. The OAM signal can be extracted by demodulating the subcarrier signal in which the OAM signal is modulated from the OAM signal light in advance, and the OAM information can be obtained in the optical network device in which the main signal passes as light. it can.

With regard to the thirty-seventh invention, in the first optical network device, an OAM signal is added to the main signal light by a modulation degree and a modulation frequency such that the main signal light can be received by another optical network device. The main signal light is modulated with the modulated subcarrier signal, the transmitted optical signal is separated in the second optical network device, the subcarrier signal is extracted and demodulated to obtain an OAM signal. By using such a method, it is possible to obtain OAM information in an optical network device through which a main signal passes as light.

In the thirty-eighth aspect of the present invention, in the optical network device comprising the first optical switch circuit network, the main signal light is modulated to such a degree that the main signal light can be received by another optical network device. The main signal light is modulated with the subcarrier signal in which the OAM signal is modulated according to the frequency, and in the optical network device including the second optical switch circuit network, the transmitted optical signal is separated and the subcarrier signal is generated. Is extracted and demodulated to obtain an OAM signal. By using such a method, it is possible to obtain OAM information in an optical network device through which a main signal passes as light.

In the thirty-ninth aspect of the invention, in the first optical network device, an optical signal is added to the main signal light with a modulation degree and a modulation frequency such that the main signal light can be received by another optical network device. The main signal light is modulated with a subcarrier signal in which the information about the identifier for the path to be passed is modulated,
In the second optical network device, the transmitted optical signal is separated, the subcarrier signal is extracted and demodulated to obtain the identifier information. By using such a method, it is possible to obtain OAM information in an optical network device through which a main signal passes as light.

With regard to the fortieth aspect of the invention, in the first optical network device, the optical signal is supplied to the main signal light at such a modulation degree and a modulation frequency that the main signal light can be received by another optical network device. The main signal light is modulated with a subcarrier signal in which the information about the identifier for the path to be passed is modulated,
In the optical network device including the second optical switch circuit network, the transmitted optical signal is separated, the subcarrier signal is extracted and demodulated, and the information of the identifier is obtained. By using such a method, it is possible to obtain OAM information in an optical network device through which a main signal passes as light.

With regard to the forty-first aspect of the invention, an optical demultiplexing means such as a WDM coupler arranged before the optical function circuit means is used to transmit O from another optical network device.
The AM signal light can be separated and extracted. Further, by using the optical separating means arranged in the next stage, the OAM signal light transmitted from another optical network device can be separated and extracted. Further, the supervisory signal light can be superposed on the main signal light by using the optical superimposing means arranged in the next stage. Further, the supervisory signal light can be separated and extracted by using an optical separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means. Further, by using the optical superimposing means arranged in the next stage, OAM to other optical network equipment is possible.
The signal can be superimposed on the main signal light. Therefore, in the optical switch network through which the main signal light passes as it is, OA
M signal light can be transmitted and received, and the optical switch circuit network can be monitored.

With regard to the forty-second aspect of the invention, by using a means for separating wavelengths such as a WDM coupler arranged in front of the optical function circuit means, the wavelengths belonging to the second group transmitted from another optical network device are OAM signal light can be separated and extracted. Further, by using the optical demultiplexing means arranged in the next stage, the OAM modulated into the subcarrier signal transmitted from another optical network device is obtained.
The signal light can be separated and extracted, and the OAM signal can be extracted from the subcarrier signal by using the optical receiver connected to the output thereof. Further, by using the optical superimposing means arranged in the next stage, the supervisory signal light of the wavelength belonging to the third group can be superposed on the main signal light of the wavelength belonging to the first group. Further, by using an optical separation means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means, it is possible to separate and extract the supervisory signal light of the wavelength belonging to the third group. Further, by using the optical superimposing means arranged in the next stage, it is possible to superimpose an OAM signal (light having a wavelength not belonging to the first group) to another optical network device on the main signal light. Therefore, the OAM signal light can be transmitted and received in the optical switch circuit network through which the main signal light passes as it is, and the optical switch circuit network can be monitored.

With regard to the forty-third aspect of the present invention, the optical demultiplexing means such as the WDM coupler disposed in the preceding stage of the optical function circuit means is used to transmit data from another optical network device.
The AM signal light can be separated and extracted. Further, the supervisory signal light can be superposed on the main signal light by using the optical superimposing means arranged in the next stage. Further, the supervisory signal light can be separated and extracted by using an optical separating means such as a WDM coupler arranged at the subsequent stage of the optical function circuit means. Further, by using the optical separating means arranged in the next stage, the OAM signal light transmitted from another optical network device can be separated and extracted. Further, by using the optical superimposing means arranged in the next stage, OAM to other optical network equipment is possible.
The signal can be superimposed on the main signal light. Therefore, in the optical switch network through which the main signal light passes as it is, OA
M signal light can be transmitted and received, and the optical switch circuit network can be monitored.

With regard to the forty-fourth invention, by using a wavelength separating means such as a WDM coupler arranged in the preceding stage of the optical function circuit means, the wavelength belonging to the second group transmitted from another optical network device is detected. OAM signal light can be separated and extracted. Further, by using the optical superimposing means arranged in the next stage, the supervisory signal light of the wavelength belonging to the third group can be superposed on the main signal light of the wavelength belonging to the first group. In addition, the WD arranged in the latter stage of the optical function circuit means
By using the light separating means such as the M coupler, it is possible to separate and extract the supervisory signal light of the wavelength belonging to the third group. Further, by using the optical separating means arranged in the next stage, the OAM signal light modulated into the subcarrier signal transmitted from another optical network device can be separated and extracted, and its output By using the optical receiver connected to the
The signal can be extracted. Further, by using the optical superimposing means arranged in the next stage, it is possible to superimpose an OAM signal (light having a wavelength not belonging to the first group) to another optical network device on the main signal light. Therefore, the OAM signal light can be transmitted and received in the optical switch circuit network through which the main signal light passes as it is, and the optical switch circuit network can be monitored.

In the forty-fifth aspect of the invention, the optical superimposing means is inserted after the optical signal is output from the optical functional circuit means, and the OA
By superimposing the optical signal obtained by modulating the M signal on the subcarrier on the main signal, the OAM signal light is superimposed on the main signal light,
It can be transmitted to other nodes. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is to another optical network device.

With regard to the forty-sixth aspect, before the optical signal transmitted from another optical network device is input to the optical function circuit means, the optical signal is modulated by the subcarrier signal in which the OAM signal is modulated. As a result, the OAM signal can be superimposed on the main signal light. Therefore, the OAM signal can be transmitted from the optical functional circuit means through which the main signal light passes as it is to another optical network device.

With regard to the forty-seventh invention, after the optical signal transmitted from another optical network device is output from the optical function circuit means, the optical signal is modulated by the subcarrier signal in which the OAM signal is modulated. Thus, the OAM signal can be superimposed on the main signal light. Therefore, the OAM signal can be transmitted from the optical functional circuit means through which the main signal light passes as it is to another optical network device.

With regard to the forty-eighth invention, by inserting the optical superimposing means before the optical signal is inputted to the optical function circuit means, the OAM signal light is superposed on the main signal light and transmitted to another node. be able to. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is to another optical network device.

In the forty-ninth aspect of the invention, the optical superimposing means is inserted after the optical signal is output from the optical switch circuit network, and O
By superimposing an optical signal obtained by modulating an AM signal on a subcarrier on a main signal, the OAM signal light can be superposed on the main signal light and transmitted to another node. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is to another optical network device.

In the fiftieth invention, before an optical signal transmitted from another optical network device is input to the optical switch network, the optical signal is modulated with a subcarrier signal in which an OAM signal is modulated. As a result, the OAM signal can be superimposed on the main signal light. Therefore, the OAM signal can be transmitted from the optical functional circuit means through which the main signal light passes as it is to another optical network device.

According to the fifty-first invention, after the optical signal transmitted from another optical network device is output from the optical switch network, the optical signal is modulated by the subcarrier signal in which the OAM signal is modulated. Thus, the OAM signal can be superimposed on the main signal light. Therefore, the OAM signal can be transmitted from the optical functional circuit means through which the main signal light passes as it is to another optical network device.

In the fifty-second aspect of the invention, before the optical signal is input to the optical switch circuit network, the optical superimposing means is inserted to superimpose the OAM signal light on the main signal light and transmit it to another node. be able to. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is to another optical network device.

In the fifty-third invention, the same OAM signal light is distributed to m optical transmission lines in advance to m optical transmission lines, and these are separated by an optical demultiplexer connected to the preceding stage of the optical functional circuit means. An OAM signal can be obtained by separating and extracting using the means, selecting using the selecting means, and inputting to the optical receiving means. Therefore, the OAM information can be obtained from the optical network device through which the main signal passes as light.

In the fifty-fourth invention, the same OAM signal light is distributed to m optical transmission lines in advance in m optical transmission lines, and these are separated by an optical demultiplexer connected to the preceding stage of the optical functional circuit means. An OAM signal can be obtained by separating and extracting using the means, receiving using m optical receiving means, and selecting the received signal using the selecting means. Therefore, in the optical network equipment where the main signal passes through as it is,
M information can be obtained.

In the fifty-fifth aspect of the invention, the OAM signal output from the information processing means is converted into an optical signal by the optical transmitting means, is m-branched by the optical branching means, and is placed in the subsequent stage of the optical function circuit means. The individual optical superimposing means superimposes it on the main signal light passing through each optical transmission path and transmits it to another node. Therefore, the OAM information can be transferred from the optical network device through which the main signal passes as light.

With regard to the fifty-sixth invention, the OAM signal output from the information processing means is branched into m by the branching means, converted into an optical signal by the optical transmitting means, and by the optical superimposing means arranged at the subsequent stage of the optical function circuit means. , And is superposed on the main signal light passing through each optical transmission line and transmitted to another node. Therefore, the OAM information can be transferred from the optical network device through which the main signal passes as light.

In the fifty-seventh aspect of the invention, the same OAM signal light is previously distributed to m optical transmission lines to m optical transmission lines, and these are separated by an optical demultiplexer connected to the preceding stage of the optical function circuit means. The OAM signal can be obtained by separating and extracting using the means, selecting using the selecting means, and inputting to the optical receiving means. The OAM signal output from the information processing means is converted into an optical signal by the optical transmission means, is m-branched by the optical branching means, and is arranged at the subsequent stage of the optical function circuit means.
The individual optical superimposing means superimposes it on the main signal light passing through each optical transmission path and transmits it to another node. Therefore, in the optical network equipment where the main signal passes through as it is,
M information can be exchanged.

With regard to the fifty-eighth invention, the same OAM signal light is distributed to m optical transmission lines in advance to m optical transmission lines, and these are separated by an optical demultiplexer connected to the preceding stage of the optical functional circuit means. An OAM signal can be obtained by separating and extracting using the means, receiving using m optical receiving means, and selecting the received signal using the selecting means. In the fifty-fifth invention, the OAM signal output from the information processing means is converted into an optical signal by the optical transmission means, m-branched by the optical branching means, and m pieces of light arranged at the subsequent stage of the optical function circuit means. The superimposing means superimposes it on the main signal light passing through each optical transmission path and transmits it to another node. Therefore, it is possible to send and receive OAM information in the optical network device through which the main signal passes as light.

In the fifty-ninth invention, the same OAM signal light is distributed to m optical transmission lines in advance to m optical transmission lines, and these are separated by an optical demultiplexer connected to the preceding stage of the optical functional circuit means. The OAM signal can be obtained by separating and extracting using the means, selecting using the selecting means, and inputting to the optical receiving means. The OAM signal output from the information processing means is branched into m by the branching means, converted into an optical signal by the optical transmitting means, and passed through each optical transmission path by the optical superimposing means arranged at the subsequent stage of the optical functional circuit means. It is superimposed on the main signal light and transmitted to another node. Therefore, it is possible to send and receive OAM information in the optical network device through which the main signal passes as light.

With regard to the sixtieth invention, the same OAM signal light is distributed to m optical transmission lines in advance in m optical transmission lines, and these are separated by an optical demultiplexer connected to the preceding stage of the optical functional circuit means. An OAM signal can be obtained by separating and extracting using the means, receiving using m optical receiving means, and selecting the received signal using the selecting means. The OAM signal output from the information processing means is branched into m by the branching means, converted into an optical signal by the optical transmitting means, and passed through each optical transmission path by the optical superimposing means arranged at the subsequent stage of the optical functional circuit means. It is superimposed on the main signal light and transmitted to another node. Therefore, it is possible to send and receive OAM information in the optical network device through which the main signal passes as light.

With regard to the sixty-first invention, in the first optical network device, the OAM signal light of the wavelengths belonging to the same second group in the m optical transmission lines is used as the main signal light (first group) of each optical transmission line. Light having a wavelength belonging to (1) and transmitted to the second optical network device. In the second optical network device, in each optical transmission line, OAM signal light having a wavelength belonging to the second group is separated by using a separating unit that separates wavelengths, and one of the optical signals is electrically converted as an OAM signal. OAM what was done
By inputting the signal to the information processing device, the first optical network device through which the main signal passes as light remains
OAM information can be transmitted to the optical network device.

With regard to the sixty-second invention, in the first optical network device, the OAM signal light of the wavelength belonging to the second group is selected from the m optical transmission lines, and the main signal light of each optical transmission line (first (Wavelengths belonging to the group) and transmitted to the second optical network device. In the second optical network device, in each optical transmission line, the OAM signal light of the wavelength belonging to the second group is separated by using a separating unit for separating the wavelength, and the transmitted OAM signal light is electrically converted as an OAM signal. The OAM information can be transmitted from the first optical network device through which the main signal passes as it is to the second optical network device by inputting the obtained information to the OAM signal information processing device.

With regard to the sixty-third invention, in the first optical network device, the OAM signal light of the wavelengths belonging to the same second group in the m optical transmission lines is used as the main signal light (first group) of each optical transmission line. Light having a wavelength belonging to (1) and transmitted to the second optical network device. In the second optical network device, in each optical transmission line, OAM signal light having a wavelength belonging to the second group is separated by using a separating unit that separates wavelengths, and one of the optical signals is electrically converted as an OAM signal. OAM what was done
A first optical network in which a main signal passes as it is, by inputting the signal to an information processing device, but changing one selected optical signal into an OAM signal light transmitted from different optical transmission paths with time. OAM information can be transmitted from the device to the second optical network device.

With regard to the sixty-fourth invention, in the first optical network device, the OAM signal light of the wavelength belonging to the second group is selected from the m optical transmission lines, and the main signal light of each optical transmission line (first (Wavelengths belonging to the group) and transmitted to the second optical network device. At that time, the selected optical transmission line is changed with time. In the second optical network device, in each optical transmission line, a second separating unit that separates wavelengths is used.
By separating the OAM signal light of the wavelengths belonging to the group and electrically converting the transmitted OAM signal light as an OAM signal to the information processing device of the OAM signal, the main signal passing as light is transmitted. OAM information can be transmitted from one optical network device to the second optical network device.

With regard to the sixty-fifth aspect, in the first optical network device, the OAM signal light having the wavelengths belonging to the same second group in the m optical transmission lines is used as the main signal light (first group) of each optical transmission line. Light having a wavelength belonging to (1) and transmitted to the second optical network device. In the second optical network device, in each optical transmission line, OAM signal light having a wavelength belonging to the second group is separated by using a separating unit that separates wavelengths, and one of the optical signals is electrically converted as an OAM signal. OAM what was done
Input the signal to the information processing device. At that time, when a failure occurs in one optical signal to be selected, control is performed so that OAM signal light from another optical transmission line is selected. OAM information can be transmitted from the first optical network device through which the main signal passes as it is to the second optical network device.

With regard to the sixty-sixth aspect, in the first optical network device, the OAM signal light of the wavelength belonging to the second group is selected from the m optical transmission lines, and the main signal light of each optical transmission line (first (Wavelengths belonging to the group) and transmitted to the second optical network device. At that time, if a failure occurs in the OAM signal light being transmitted, control is performed so that the OAM signal is transmitted using another optical transmission path. In the second optical network device, in each optical transmission line, the OAM signal light of the wavelength belonging to the second group is separated by using a separating unit for separating the wavelength, and the transmitted OAM signal light is electrically converted as an OAM signal. The OAM information can be transmitted from the first optical network device through which the main signal passes as it is to the second optical network device by inputting the obtained information to the OAM signal information processing device.

In the sixty-seventh aspect of the present invention, the same OAM signal light is previously distributed to m optical transmission lines to m optical transmission lines, and the first OAM signal light is connected to the front stage of the optical functional circuit means.
It separates and extracts using the light separation means of. By tapping each of the extracted OAM signal lights by using the second optical demultiplexing means, each OA which is transmitted through each optical transmission line is tapped.
It is possible to know the reception state of the M signal light. It is also possible to monitor the state such as the optical level of the main signal light transmitted through the same optical transmission line as the OAM signal light. The OAM signal output to the one connected to the selecting means of the output ends of the second optical separating means is selected by the selecting means and input to the optical receiving means, and this optical network device obtains the OAM signal. be able to. Therefore, OAM information can be obtained from the optical network device through which the main signal passes as it is, and the optical signal can be monitored.

According to the sixty-eighth aspect of the invention, when the OAM signal multiplexed with the main signal light is transmitted in advance, the OAM signal light is separated by the light separating means and input to the light receiving means. The received signal is separated into OAM information for performing communication of the first group protocol and OAM information for performing communication of the second group protocol by using the information separating means, and the respective processing is performed. As a result, it is possible to perform communication by separating into a protocol that requires a quick response and sends good OAM information with only a simple message, and a protocol that requires complicated processing.
OAM information can be efficiently obtained at a node that passes information as an optical signal as it is.

In the sixty-ninth aspect of the invention, when the OAM signal multiplexed with the main signal light is transmitted in advance, the OAM signal light is separated by the light separating means and input to the light receiving means. The received signal is subjected to the first group of protocols (the relative position of the bit on the frame and its value are O
It is separated into OAM information for performing communication of bit-oriented communication (AM information) and OAM information for performing communication of the second group protocol, and the respective processing is performed. As a result, the first protocol that requires fast response and requires only simple messages,
It is possible to perform communication by separating into a protocol that requires complicated processing, and it is possible to efficiently obtain OAM information at a node that passes OAM information as an optical signal.

According to the 70th aspect of the invention, an OAM signal is divided into a first group protocol and a second group protocol and outputted from an information processing means for carrying out OAM processing, and signals superposed on each other are used by an optical transmitting means. The optical signal is converted into an optical signal, and the optical signal is superimposed on the main signal light by using the optical superimposing means and transmitted to another optical network device. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is.

According to the seventy-first invention, the OAM signal is transmitted from the information processing means for performing the OAM processing to the protocol of the first group (the relative position of the bit on the frame and its value are OAM).
(Bit-oriented communication, which is information) and the second group of protocols, and outputs the divided signals, and the signals superposed on each other are converted into optical signals by using the optical transmission means, and are superposed on the main signal light by using the optical superposition means. , To other optical network equipment. Therefore,
OA from the optical network equipment through which the main signal passes as light
M information can be transmitted.

With regard to the 72nd aspect of the present invention, the first O-type communication is carried out in advance in the m optical transmission lines by using the protocol of the first group.
OAM signal light including AM information and second OAM information (OAM information regarding m optical transmission lines is superimposed) that communicates using the second group protocol is superimposed on the main signal light and transmitted. In the optical system, only the OAM signal light of each optical transmission line is separated from the main signal by using the optical separation means connected to the optical function circuit means, and one OAM is selected by using the selection means.
Only the signal is input to the OAM information processing means, the first OAM information is input to the first protocol processing means and processed, and the second OAM information regarding each optical transmission line is input to the second protocol processing means. Input and process to obtain each OAM information. Therefore, the OAM information can be obtained from the optical network device through which the main signal passes as light.

With regard to the seventy-third invention, the first O-type communication is performed in advance using the first group protocol in the m optical transmission lines.
Second OAM information (OAM information relating to m optical transmission lines) that communicates using AM information and a second group protocol (bit-oriented communication whose relative position on a frame and its value is OAM information) OA consisting of
In the system in which the M signal light is transmitted by being superimposed on the main signal light, only the OAM signal light of each optical transmission line is separated from the main signal by using the optical separation means connected to the optical functional circuit means. Only one OAM signal is input to the OAM information processing means by using the selection means, and the first OAM information processing means receives the first OAM signal as the first OAM information processing means.
The AM information is input and processed, and the second OAM information regarding each optical transmission line is input to the second protocol processing means and processed to obtain each OAM information. Therefore, the OAM information can be obtained from the optical network device through which the main signal passes as light.

With regard to the seventy-fourth invention, the OAM signal output from the information processing means is converted into the first OAM information (communication by the protocol of the first group) and the second OAM information (communication by the protocol of the second group). , OAM information about each optical transmission line is stored), and output and processed.
The AM signal is superimposed and input to the optical branching / transmitting means. The output signal light from the optical branching / transmitting means is input to each optical superposing means, superposed on the main signal light by each optical superposing means, and the OAM signal is transmitted to each optical transmission line. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is.

In the seventy-fifth aspect of the present invention, the OAM signal output from the information processing means is communicated by the first group protocol with the first OAM information and the second group protocol (the relative position of the bit on the frame). And OAM information whose value is OAM information) are separated into second OAM information (having OAM information about each optical transmission line) for communication, and then output and processed, and then an OAM signal is superposed and optical branching is performed. Input to the transmission means. The output signal light of the optical branching and transmitting means is input to each optical superimposing means and superposed with the main signal light by each optical superimposing means,
An OAM signal is transmitted to each optical transmission line. Therefore, the OAM information can be transmitted from the optical network device through which the main signal passes as it is.

In the seventy-sixth aspect of the present invention, the optical demultiplexing means is inserted into the optical transmission line through which the optical signal passes as it is, and the OAM signal light separated by the optical demultiplexing means is input to the optical receiving means to input the OAM signal.
A signal is obtained and OAM information is input to the information processing means. In the information processing means, after processing the OAM information, the OAM
The signal and the signal from the signal output device are superimposed, converted into an optical signal by the optical transmission means, and transmitted to another optical network device. Therefore, it is possible to send and receive OAM information in the optical network device through which the main signal passes as light.

In the seventy-seventh aspect of the invention, after receiving the signal using the optical receiving means connected to the optical function circuit means, the OAM signal (only the OAM information relating to the transmitted optical transmission line is received) using the signal separating means. Rather, it is separated into a signal that is not an OAM signal and OAM information of an optical transmission line through which an optical signal that passes as an optical signal is transmitted), and the OAM signal is input to the information processing means. After processing the OAM information, the information processing means superimposes it on the signal from the signal output means using the signal superimposing means, converts it into an optical signal using the optical transmitting means, and transmits it to another node. Therefore, the OAM information can be transmitted and received in the optical network device through which the main signal passes as light.

With regard to the seventy-eighth invention, after receiving a signal using the optical receiving means connected to the optical switch network,
An OAM signal (including not only OAM information on the transmitted optical transmission line but also OAM information on the optical transmission line on which an optical signal that passes as an optical signal is transmitted) and a signal that is not an OAM signal using the signal separation means And the OAM signal is input to the information processing means. After processing the OAM information, the information processing means superimposes it on the signal from the signal output means using the signal superimposing means, converts it into an optical signal using the optical transmitting means, and transmits it to another node. At least one electrically terminated optical signal is input and at least one electrically terminated optical signal is output, so that in this optical network device, it is possible to ensure that the optical network device receives O from another optical network device.
AM signals can be received and OAM signals can be transmitted to other optical network devices. Therefore, in the optical network equipment where the main signal passes through as it is,
M information can be exchanged.

[0163]

EXAMPLES The present invention will be described in detail below with reference to examples.

In the following description, where the subcarrier is described as being superimposed on the main signal, the subcarrier frequency has a frequency that does not affect the frequency component of the main signal, and the subcarrier modulation factor is the main signal. A modulation degree that does not prevent reception is used. Further, in the following description, a DFB (distributed feedback) laser diode can be used as the optical transmitter. Further, in the following description, an APD (avalanche photodiode) can be used as the optical receiver.

An embodiment of the first invention will be described with reference to FIG.

FIG. 1 is a block diagram showing a first embodiment of the first invention. In FIG. 1, 107 represents an optical network node (optical network device). 101 is an optical receiver (optical receiving means), 102 is an optical switch circuit network (optical functional circuit means), 103 and 106 are optical transmission lines, 10
Reference numeral 4 is a directional coupling type optical coupler (optical separating means) in which the ratio of the optical power output to the input end of the optical switch circuit network 102 and the optical power output to the input end of the optical receiver 101 is 95: 5. Reference numeral 105 denotes an information processing device (information processing means) that processes a signal obtained from the optical receiver 101, and a workstation can be used.

As the optical switch circuit network 102, as shown in FIG. 42, 64 × formed by combining a plurality of 8 × 8 matrix optical switches formed using LiNbO _3.
64 optical switch circuits (Shiragaki et al.
Sea '93 (ECOC'93: European Co
nference on Optical Commu
(Nication) Proceedings Volume 2, TuP
See pages 5.3 and 153). Although many optical transmission lines are input to and output from the optical switch circuit network 102, only one input optical transmission line and one output optical transmission line are shown in the figure for convenience of explanation. In the optical transmission line, for example, SDH (Synchronous Dig) is used.
ital Hierarchy: CCITT Blue
Book-Recommendation G.M. 70
7, G.I. 708, G.I. 709) can be used to transmit an optical signal.

The optical signal transmitted from the optical transmission line 103 is input to the optical switch circuit network 102. However, when the optical coupler 104 and the optical receiver 101 are not connected, the optical switch circuit network 102 outputs the optical signal. Since it passes through as it is, network operation, management and maintenance information such as an instruction to change the switch state of the optical switch network 102 (hereinafter, referred to as OAM (Operation, Administration)
It is not possible to receive information such as “translation, andMaintenance”).

However, in the optical network device of the present invention, about 5% of light can be tapped by the optical coupler 104 and received by the optical receiver 101. After that, S
DH normal SOH (Section Overhea)
OAM information can be received by performing the processing of d). Specifically, the SDH transmission frame is time-division demultiplexed and predetermined in the SOH.
The byte for M is extracted and communication is performed.

Further, by monitoring the optical power of the received signal and the error rate, it is possible to determine whether or not a failure has occurred in the transmitted optical transmission line. Even when passing through the optical switch circuit network 102, it is possible to determine whether a failure has occurred in the optical transmission line before being input to the optical switch circuit network 102 and to monitor the signal quality. For example, in the case of SDH, B in SOH
Parity check can be performed by monitoring 1 byte.

As described above, in the optical transmission line, the optical signal in which the OAM information of the optical network is embedded by time division multiplexing in addition to the main signal like SDH is transmitted in advance, and the optical coupler 104 Partially branched and received optical signal, OA
Only the M information portion can be time-division demultiplexed to obtain the OAM information at the node 107 where the optical signal passes through as it is. In addition, when an optical functional circuit through which an optical signal passes as it is, is added to an existing network, a part of the existing SDH transmission frame is used by being expanded in the present embodiment. It is possible to introduce an optical functional circuit means (here, an optical switch circuit network) that passes an optical signal through a node smoothly and at low cost without the need to increase the number of transceivers.

In the first embodiment, SDH is used as the frame of the optical signal transmitted through the optical transmission line.
For example, like SONET, the main signal and OAM are included in the optical signal.
The present invention can be applied by using a transmission frame that is time division multiplexed with information.

Next, a second embodiment of the first invention will be described with reference to FIG.

The same configuration as that of FIG. 1 is used. OA for main signal light
By superimposing subcarriers carrying M information, the optical transmission path 103 is transmitted. In the node configuration of FIG. 1, the optical receiver 101 (optical receiving means) is capable of demodulating a subcarrier (extracting only the frequency component of the subcarrier and demodulating a signal modulated therein). To use. By using such a device, OAM information of the optical network can be obtained, and by monitoring the received subcarrier, the optical signal and the optical transmission line can be monitored.

Next, a third embodiment of the first invention will be described with reference to FIG.

FIG. 2 is a block diagram showing a third embodiment of the first invention. In FIG. 2, a node 207 represents an optical network node (optical network device). The node 207 has the configuration of FIG. 1 showing the first embodiment of the first invention, and does not use the optical coupler 104 as an optical demultiplexing means, but a WDM coupler (Wavelength Div).
Sion multiplex coupler: Here, it is used as a separating means capable of separating wavelengths with almost no branching loss. ) 204, which can be used as an embodiment of the present invention. WDM coupler 204 is 1.31μ
The light of m wavelength is output to the output end connected to the optical switch network 202, and the light of 1.55 μm wavelength is output to the optical receiver 20.
1 is a WDM coupler (optical separating means) for outputting to an output terminal connected to 1. Reference numeral 207 denotes an optical network node (optical network device).

The main signal is transmitted through the optical transmission line by using an SDH transmission frame and an optical signal having a wavelength of 1.31 μm. In addition, an optical signal for transmitting OAM information of the optical network (hereinafter referred to as OAM signal light here) is 1.55 μm.
It transmits using the optical signal of the wavelength.

With the WDM coupler 204, O of 1.55 μm was obtained.
The AM signal light is input to the receiver 101, and the optical receiver 101
The OAM signal light can be received by using, and OAM information can be obtained.

The state of the optical transmission line can be monitored from the state of the optical signal obtained by the optical receiver 101. The optical transmission line connected in front of the optical switch network 102 is
If it is cut off, the optical receiver 101 cannot receive the OAM signal, so it can be seen that the optical transmission path 103 before being input to the optical switch circuit network 102 has failed.

In this embodiment, the WDM coupler for separating the optical signal having the wavelength of 1.31 μm and the optical signal having the wavelength of 1.55 μm is used. However, if the optical signals can be separated,
The present invention can be applied not only to this wavelength band but also to a WDM coupler that separates into any wavelength band.

Next, an embodiment of the second invention will be described. FIG. 2 is a block diagram showing an embodiment of the second invention. In FIG. 2, reference numeral 207 is an optical network node (optical network device). The second invention limits the light separating means of the first invention to a means for separating wavelengths such as a WDM coupler, and the details have been described in the third embodiment of the first invention. Reference numeral 204 denotes a WDM coupler (light separating means), which has a wavelength of 1.3 as a wavelength belonging to the first group.
1 μm wavelength, 1.55 μm as a wavelength belonging to the second group
Can be used.

Although the second invention limits the first invention, it has the following effects.

When the optical coupler 104 of the first embodiment is used, there is a branch loss due to branching, but in the second invention,
Since the main signal light and the signal light for transmitting the OAM information are separated by using the WDM coupler 204, there is no branching loss, and there is little change in the loss budget of the main signal system due to the introduction of the present invention. Further, since the wavelength division multiplexing technique is used, it is not necessary to change the existing transmitter so that the subcarriers can be superposed as in the case of using the second embodiment of the first invention, and it can be economically introduced. There are advantages. Further, when the wavelength division multiplexing technique is used, the capacity of the OAM line can be freely increased as compared with the case where the first and second embodiments are used. In addition, even if you want to upgrade the OAM line after installation, you can upgrade independently from the main signal system because an optical transmitter different from the main signal system optical transmitter is used. is there.

Next, an embodiment of the third invention will be described with reference to FIG.

FIG. 3 is a block diagram showing an embodiment of the third invention. The main signal light is transmitted using light having a wavelength of 1.31 μm. In FIG. 3, 307 is an optical network node (optical network device). 302 is an optical switch circuit network (optical functional circuit means), 303 is an optical transmission line, 3
Reference numeral 01 is an optical transmitter (optical transmission means) for transmitting light having a wavelength of 1.55 μm, and 304 is a directional coupling type optical optical coupler for coupling two input lights with a power ratio of 1: 1. Then, it is used as a coupler (optical superimposing means) for the input light from the output end of the optical switch network 302 and the input light from the output end of the optical transmitter 301. Reference numeral 305 denotes an information processing device (information processing means) for processing OAM information, which can be a workstation. As the optical switch circuit network 302, the same optical switch circuit network as the optical switch circuit network 102 used in the embodiment of the first invention can be used.

Since the optical signal passes through the optical switch network 302 as it is, the optical switch network 3 is used when the optical coupler 304 and the optical transmitter 301 are not connected.
The OAM information of the network such as the command for changing the switch state in 02 cannot be transmitted to other nodes.

However, in the optical network device of the present invention, the OAM information from the information processing device 305 is transmitted to the optical transmitter 3.
01 can be used to generate light having a wavelength (1.55 μm) different from that of the main signal light (1.31 μm). By superimposing this and the main signal light by the optical coupler 304, It is possible to transmit OAM signals. At the node where this optical signal is transmitted, 1.55 μm and 1.31 μm
1.55 μm using a WDM coupler that separates
It is possible to extract the OAM signal light of the wavelength of. At the node to which this optical signal has been transmitted, only the OAM signal can be extracted using the node shown in FIG. 2 which is an embodiment of the second invention.

The present invention is not limited to this embodiment.

For example, although the optical coupler 304 is used in the embodiment, the present invention can be applied by superposing the wavelength of the main signal light and the wavelength of the OAM signal light by using the WDM coupler.

Further, in the embodiment, the optical transmitter 301 is used as the optical transmission means, but the optical transmission is controlled so that the polarization of the optical signal to be transmitted is the polarization orthogonal to the main signal light. The present invention can also be applied by using a method in which the main signal light and the OAM signal light are polarization-multiplexed and transmitted by using a device, and the polarization is separated on the receiving node side using a polarization splitter. The polarization splitter can be realized by using a crystal having a birefringence such as LiNbO ₃ .

Next, an embodiment of the fourth invention will be described with reference to FIG.

FIG. 4 is a block diagram showing an embodiment of the fourth invention. In FIG. 4, reference numeral 409 is an optical network node (optical network device). 403 is an optical switch network (optical functional circuit means), 407 and 408 are optical transmission lines, 401 is an optical receiver (optical receiving means) capable of receiving light of 1.55 μm, and 405 is a wavelength of 1.55 μm. The optical transmitter (optical transmitting means) 404 for transmitting the light of the above is an optical coupler, and the optical coupler 30 used in the embodiment of the third invention.
The same as 4 can be used. Here, the signal light from the output end of the optical switch network 403 and the optical transmitter 40 are
It is used as a coupler (optical superimposing means) with the optical signal from the output end of the optical fiber 5. The reference numeral 402 outputs the light having a wavelength of 1.31 μm out of the light inputted from the optical transmission line 407 to the output end connected to the optical switch network 403, and the light having a wavelength of 1.55 μm to the optical receiver 401. It is a WDM coupler (optical separation means) that outputs to a connected output end. An information processing apparatus (information processing means) 406 processes a signal obtained from the optical receiver 401, and a workstation can be used. As the optical switch circuit network 403, the same optical switch circuit network as the optical switch circuit network 102 used in the first invention can be used.

In addition to the main signal light having a wavelength of 1.31 μm, OAM information is transmitted to the optical transmission line 407 using an optical signal having a wavelength of 1.55 μm (hereinafter referred to as OAM signal light). The light arriving at the node 409 is separated into the OAM signal light and the main signal light by the WDM coupler 402, the main signal light is input to the optical switch circuit network 403, and the OAM signal light is input to the optical receiver 401. The OAM signal received using the optical receiver 401 is processed by the information processing device 406,
The OAM information is rewritten and input to the optical transmitter 405. New (rewritten) output from the optical transmitter 405
In the optical coupler 404, the OAM signal light is superimposed on the main signal light that has passed through the optical switch circuit network 403, input to the optical transmission line 408, and transmitted to another node.

As described above, since the WDM coupler 401 is used in the system in which the main signal light and the OAM signal light are wavelength-division-multiplexed and transmitted, only the OAM signal of 1.55 μm can be extracted. After the information processing apparatus 406 processes the information and rewrites the OAM signal, the OA having a wavelength (1.55 μm) different from that of the main signal (1.31 μm) is displayed again.
Since the M signal light can be generated and superposed on the main signal for transmission, the OAM signal of the optical network can be transmitted and received at the node that passes the optical signal as it is. In the node where this optical signal is transmitted, by using the WDM coupler that separates the light having the wavelengths of 1.31 μm and 1.55 μm as in this node, only the OAM signal light can be extracted and the OAM information can be obtained. it can.

Further, by monitoring the state (reception level, error rate, etc.) of the optical signal received by the optical receiver 401,
The disconnection state of the optical transmission line 407 can be understood.

The present invention is not limited to this embodiment.

For example, although the WDM coupler 402 is used as the optical demultiplexing means, the sub-carrier in which the OAM information is modulated is superposed on the main signal light in advance, and the optical coupler is used in place of the WDM coupler. Tap a part,
The optical receiver 401 can receive a subcarrier signal,
By using a receiver that can demodulate OAM information,
AM information can be obtained and the present invention can be applied.

An embodiment of the fifth invention will be described with reference to FIG.

FIG. 5 is a block diagram showing an embodiment of the fifth invention. In FIG. 5, reference numeral 506 is an optical network node (optical network device). Reference numeral 503 is an optical switch circuit network (optical functional circuit means), and 507 and 508 are optical transmission lines. Reference numeral 505 is an optical transmitter (optical transmitting means) that transmits light having a wavelength of 1.55 μm, which is a wavelength different from the main signal light passing through the optical switch network 503 and the optical transmission lines 507 and 508. Reference numeral 504 denotes a directional coupling type optical optical coupler (optical superimposing means) that combines input light with a ratio of optical power of 1: 1 and outputs the optical signal. Here, an optical signal from the output end of the WDM coupler 502 is used. It is used as a coupler with the optical signal from the output end of the optical transmitter 505. 502 is 1.31 μm
The light of the wavelength is output to the optical coupler 504,
It is a WDM coupler (optical separating means) connected so as to output light having a wavelength of μm to the optical receiver 501.
506 is an information processing device (information processing means) for processing a signal obtained from the optical receiver 501, and a workstation can be used. As the optical switch network 503, the same optical switch network as the optical switch network 102 of the first embodiment of the invention can be used. An SDH transmission frame is used as the main signal light transmitted through the optical transmission path.

As shown in FIG. 5, in the fifth invention, only the connection order of the fourth invention is changed, and the action, effect,
The present invention is not limited to this embodiment, and the like is the same as the description of the embodiment of the fourth invention.

An embodiment of the sixth invention will be described with reference to FIG.

FIG. 6 is a block diagram showing an embodiment of the sixth invention. In FIG. 6, reference numeral 609 denotes an optical network node (optical network device). 603 is an optical switch circuit network (optical functional circuit means), and 607 and 608 are optical transmission lines. 602 has a wavelength of 1.31 μm and 1.55 μ
WDM coupler for separating light of wavelength m (light separating means)
Is. Reference numeral 605 denotes an optical transmitter (optical transmission means) for transmitting light having a wavelength of 1.55 μm, which is a wavelength different from the main signal light passing through the optical switch network 603 and the optical transmission lines 607 and 608, and 604 is input. This is a directional coupling type optical coupler that combines and outputs two lights at a power ratio of 1: 1. Here, an optical signal from the output end of the WDM coupler 602 and an optical signal from the output end of the optical transmitter 606 are used. Used as a coupler (light superimposing means) with a signal. 602 is connected so as to output light having a wavelength of 1.31 μm to an output end connected to the optical switch network 603 and output light having a wavelength of 1.55 μm to an output end connected to the optical receiver 601. ing. 606
A workstation can be used as an information processing device (information processing means) that processes a signal obtained from the optical receiver 601. As the optical switch circuit network 603, the optical switch circuit network 102 used in the embodiment of the first invention can be used. SD as the main signal light transmitted through the optical transmission line
H transmission frames can be used.

As shown in FIG. 6, in the sixth invention, only the connection order of the fourth invention is changed, and the explanation of the operation and effect is the same as the explanation of the embodiment of the fourth invention.

As the embodiment of the seventh invention, the same one as described in the embodiment of the first invention can be used. The optical functional circuit means is limited to the optical switch network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The description of the operation and action is the same as that of the first embodiment of the invention.

As the embodiment of the eighth invention, the same one as described in the embodiment of the second invention can be used. The optical functional circuit means is limited to the optical switch network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The description of the operation and action is the same as that of the first embodiment of the invention.

As the ninth embodiment of the invention, the same one as described in the third embodiment of the invention can be used. The optical functional circuit means is limited to the optical switch network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The description of the operation and action is the same as that of the first embodiment of the invention.

The tenth embodiment of the invention has been described in the embodiment of the fourth invention. The optical functional circuit means is limited to the optical switch network. As an optical switch network,
The optical switch network 102 described in the embodiment of the first invention.
Can be used. The description of the operation and action is the same as that of the first embodiment of the invention.

As the eleventh embodiment of the invention, the same one as described in the fourth embodiment of the invention can be used. A wavelength of 1.31 μm as a wavelength belonging to the first group,
A wavelength of 1.55 μm can be used as the wavelength belonging to the second group. The effect of limiting the light separating means will be described below. The description of the operation and action is the same as that of the first embodiment of the invention.

When the optical coupler is used as the optical demultiplexer without using the WDM coupler, there is a branch loss due to the branching. In the eleventh invention, however, the WDM coupler is used to divide the main signal light and the OAM information. Since it is separated from the signal light to be transmitted, there is no branching loss, and there is almost no change in the loss budget of the main signal system. Therefore, it can be introduced without changing the main signal system installed in advance. Further, since the wavelength division multiplexing technique is used, there is no need to change the transmitter so that subcarriers can be superposed as in the case of using subcarriers, and there is an advantage that it can be economically introduced. In addition, even if you want to upgrade the OAM line after installation, you can upgrade independently from the main signal system because an optical transmitter different from the main signal system optical transmitter is used. is there.

The present invention is not limited to this embodiment.

For example, although the optical transmitter 405 for transmitting the light of the wavelength of 1.55 μm is used as the optical transmitting means, the main signal light and the OAM signal light are transmitted in the optical network node to which the optical transmission line 408 is connected. If the wavelengths are separable, 1.
The optical transmitter is not limited to the wavelength of 55 μm.

An embodiment of the twelfth invention will be described.
A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second group. In the twelfth invention, the connection order of the eleventh invention is simply changed, and the same embodiment as that shown in the fifth invention can be used. The operation and effect are the same as those described in the eleventh invention.

An embodiment of the thirteenth invention will be described.
A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second group. In the thirteenth invention, the connection order of the eleventh invention is simply changed, and the same embodiment as shown in the sixth invention can be used. The operation and effect are the same as those described in the eleventh invention.

The 14th invention is the same as the 11th invention.
The optical functional circuit means is limited to the optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

An embodiment of the fifteenth invention will be described with reference to FIG.

FIG. 7 is a block diagram showing an embodiment of the fifteenth invention. In FIG. 7, 721 is an optical network node (first optical network device), and 722 is an optical network node (second optical network device).
Is. Reference numerals 706 and 707 denote optical switch circuit networks, and the same optical switch circuit network as the optical switch circuit network 102 used in the embodiment of the first invention can be used. Reference numeral 701 is an optical transmitter for transmitting light having a wavelength of 1.55 μm, 702 is an optical coupler, 703, 710 and 711 are optical transmission lines, and 70
4 outputs light having a wavelength of 1.55 μm to the optical receiver 705 and outputs light having a wavelength of 1.31 μm to the optical switch network 70.
It is a WDM coupler that outputs to the 7 side. 705 is
An optical receiver (optical receiving means) capable of receiving an optical signal having a wavelength of 1.55 μm. Reference numerals 708 and 709 process the OAM information, and the optical switch network 7 is processed by a command from another node.
The connection state between the input terminal and the output terminal of 06 and 707 is changed, and conversely, the connection state between the input terminal and the output terminal of the optical switch network of another node is changed.

The main signal has been transmitted by light having a wavelength of 1.31 μm (wavelength belonging to the first group), and OAM information is transmitted using the optical transmitter 701 at a wavelength of 1.55 μm (second group). (Wavelength belonging to) is transmitted. Now, the method of the present invention for transmitting OAM information from node 721 to node 722 will be described. In the node 721, the OA which should be processed by the information processing device 708 and transmitted to another node
The M information is input to the optical transmitter 701. Optical transmitter 701
The OAM signal input to the optical coupler 702 is converted into an optical signal having a wavelength of 1.55 μm (herein referred to as OAM signal light) and input to the optical coupler 702. In the optical coupler 702, the optical signal having a wavelength of 1.31 μm transmitted through the optical transmission line 710 and passing through the optical switch network 706 as light is superimposed,
An optical signal in which the main signal light and the OAM signal light are superimposed is input to the optical transmission line 703. At the node 722, the transmitted optical signal is input to the WDM coupler 704, and the main signal light having a wavelength of 1.31 μm is input to the optical switch network 707 and having a wavelength of 1.55 μm. The OAM signal light is input to the optical receiver 705. The optical receiver 705 converts the OAM signal light into an electric signal,
The information processing apparatus 709 obtains the OAM information and processes the OAM information. In this way, from node 721 to node 7
Transmission of OAM information to 22 is performed.

As described in this embodiment, after the main signal has passed through the optical switch network 706, the OA of different wavelength is used.
Before superposing the M signal on the main signal light and inputting it to the optical function circuit means (here, the optical switch circuit network) of the next node, W
Only the OAM signal light can be extracted by the DM coupler, and the OAM signal can be exchanged.

By applying the present invention, it becomes possible to send and receive the OAM signal between the nodes which pass the optical signal as it is.

The present invention is not limited to this embodiment.

For example, in the embodiment, the main signal light is 1.
31 μm wavelength light, 1.55 μm as OAM signal light
Although the above light was used, the present invention can be applied even if a system of other wavelength combinations is used as long as it is a combination of wavelengths that can be wavelength separated by the WDM coupler.

The sixteenth invention limits the optical function circuit means of the fifteenth invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network described in the embodiment of the first invention is used. 102 can be used. The embodiment is shown in the embodiment of the fifteenth invention.

An embodiment of the seventeenth invention will be described with reference to FIG.

FIG. 8 is a block diagram showing an embodiment of the seventeenth invention. In FIG. 8, reference numeral 807 represents an optical network node (optical network device). 801 is 1.
An optical receiver (optical receiving means) capable of receiving light with a wavelength of 55 μm, 802 an optical switch circuit network (optical functional circuit means),
Reference numerals 803 and 806 are optical transmission lines, 805 is an information processing device (information processing means), and 804 outputs light having a wavelength of 1.55 μm to the optical receiver 801 and outputs light having a wavelength of 1.31 μm. Is a WDM coupler (optical separation means) having a wavelength of 1.55 μm and a wavelength of 1.31 μm connected so as to output to the optical transmission line 803. A workstation is used as the information processing device 805. The optical switch network 802 may be the same as the optical switch network used in the first embodiment of the present invention.

From the optical transmission line 806 to the optical switch network 80
2, the optical signal that passes through the WDM coupler 804 and the optical transmission path 803 is the main signal light with a wavelength of 1.31 μm. 1.31
An optical signal obtained by superimposing an OAM signal light having a wavelength of 1.55 μm on a main signal having a wavelength of μm is input to the optical switch circuit network 802. The optical signal that has passed through the optical switch network 802 is W
The DM coupler 804 outputs the main signal light having a wavelength of 1.55 μm to the optical transmission line 803 and the OAM signal light to the optical receiver 801. As described above, since the WDM coupler 804 is connected to the optical switch network 802 and the OAM signal light can be extracted from the node configuration, the node that passes the optical signal as is can
AM information can be obtained.

The present invention is not limited to this embodiment.

For example, in the embodiment, as the light separating means, W
Although the DM coupler 804 is used, an optical coupler is used instead of the DM coupler 804, and time division multiplexing is performed in the main signal light in advance.
The present invention can be applied even if the AM signal is embedded in the main signal light, and the OAM information is obtained by partially tapping the AM signal with the optical coupler and receiving it using the optical receiver 801. As a light separation means,
The present invention can be applied even if a polarization controller and a polarization splitter are used as the light splitting means without using the optical branching device or the WDM coupler. In that case, the main signal is TE-polarized, and the optical signal for transmitting the OAM information is polarization-multiplexed and transmitted using TM-polarization, each block is connected by a polarization-maintaining fiber, and only the TM-polarized light is extracted to OAM. get information. As the polarization controller, a device that applies pressure to the fiber to change the polarization can be used, and as the polarization splitter, for example, L
It can be realized by using a crystal having birefringence such as iNbO ₃ .

Next, an embodiment of the 18th invention will be described. A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second group. The eighteenth invention is limited to a means for separating wavelengths such as a WDM coupler as the "light separating means" used in the seventeenth invention.
7 of the examples of the invention.

By using the WDM coupler 804 as the optical separating means, the loss budget applied to the main signal system is little changed, and it is possible to economically introduce the existing network. Further, since the WDM coupler 804 extracts the light of the wavelength used for the OAM signal,
The optical signal other than the main signal is not superimposed on the light after passing through the WDM coupler 804, and a closed system can be created, so that information can be rewritten and monitoring is easy.

Next, a nineteenth embodiment of the invention will be described with reference to FIG.

FIG. 9 is a block diagram showing an embodiment of the nineteenth invention. In FIG. 9, reference numeral 907 represents an optical network node (optical network device). 902 is an optical switch circuit network (optical functional circuit means). 903 is an optical transmission line, 901 is an optical switch circuit network 902, and an optical transmission line 90.
An optical transmitter (optical transmitting means) 904 for transmitting light having a wavelength of 1.55 μm, which is a wavelength different from that of the main signal light (1.31 μm) passing through No. 3, is input to the two input lights at a ratio of 1: 1. It is a directional coupling type optical coupler that combines and outputs at a power ratio.
Here, the optical signal from the optical transmission line 903 and the optical transmitter 90
It is used as a coupler (optical superimposing means) that superimposes the optical signal from the output terminal of 1. Reference numeral 905 denotes an information processing device (information processing means) for processing OAM information, which can use a workstation. As the optical switch network 902, the optical switch network 102 used in the embodiment of the first invention.
The same optical switch network can be used.

Since the optical signal passes through the optical switch network 902 as it is, the optical switch network 9 is used when the optical coupler 904 and the optical transmitter 901 are not connected.
OAM such as the command to change the switch status in 02
Information cannot be transmitted to other nodes.

However, in the optical network device of the present invention, the OAM information from the information processing device 905 is sent to the optical transmitter 9
01 can be used to convert the main signal light (1.31 μm) into light having a different wavelength (1.55 μm), and the main signal light and the main signal light are superposed by the optical coupler 904.
OAM signals can be transmitted in addition to the main signals. An OAM signal can be obtained by using the node having the configuration of FIG. 2 showing the embodiment of the second invention in the node for receiving this optical signal.

The present invention is not limited to this embodiment.

For example, although the optical coupler 904 is used as the optical superimposing means in the embodiment, the present invention can be applied by superimposing the wavelength of the main signal light and the wavelength of the OAM signal light using the WDM coupler. .

Further, in the embodiment, the optical switch network 902 is used as the optical functional circuit means, but the present invention can be applied by using an optical amplifier such as an erbium-doped fiber amplifier or a semiconductor optical amplifier.

Further, although the optical transmitter 901 is used as the optical transmitting means in the embodiment, an optical transmitter in which the polarization of the optical signal to be transmitted is a polarization orthogonal to the main signal light is used.
The present invention can be applied even if polarization multiplexing is performed with signal light.

An embodiment of the twentieth invention will be described with reference to FIG.

FIG. 10 is a block diagram showing an embodiment of the twentieth invention. In FIG. 10, 1021 represents an optical network node (optical network device). 100
3 is an optical switch circuit network (optical functional circuit means), 1007,
Reference numeral 1008 denotes an optical transmission line, 1005 denotes an optical transmitter (optical transmitting means) for transmitting light having a wavelength of 1.55 μm, and 1001 denotes an optical receiver (optical receiving means) for receiving an optical signal having a wavelength of 1.55 μm. is there. Reference numeral 1004 denotes a directional coupling type optical coupler that combines two input lights with a power ratio of 1: 1 and outputs the combined light. Here, an optical signal from the optical transmission line 1007 and an output end of the optical transmitter 1005 are used. It is used as a coupler (light superimposing means) with the optical signal from the. The input light 1002 outputs light having a wavelength of 1.31 μm to the output end connected to the optical transmission path 1008, and outputs light having a wavelength of 1.55 μm to the output end connected to the optical receiver 1001. It is a WDM coupler (optical separation means) which is connected so as to output and which separates a wavelength of 1.55 μm and a wavelength of 1.31 μm. 1006
A workstation can be used as an information processing device (information processing means) that processes a signal obtained from the optical receiver 1001. As the optical switch circuit network 1003, the same optical switch circuit network as the optical switch circuit network 102 used in the first invention can be used.

In the optical switch network 1003, 1.3
In addition to the main signal light having a wavelength of 1 μm, the optical switch network 10
A monitoring signal for monitoring No. 03 is transmitted using light having a wavelength of 1.55 μm. The supervisory signal light for monitoring the optical switch circuit network 1003 output from the optical transmitter 1005 is superimposed on the main signal light that has passed through the optical transmission line 1007 in the optical coupler 1004, and the optical switch circuit network 1003 Is input to. WDM through the optical switch network 1003
The supervisory signal light that has reached the coupler 1002 is separated into supervisory signal light and main signal light, and the main signal light is transmitted to another node. The supervisory signal light is input to the optical switch network 1003 and then input to the optical receiver 1001.

As described above, since the WDM coupler 1001 is used in the system in which the main signal light and the supervisory signal light are wavelength division multiplexed and transmitted, only the supervisory signal of 1.55 μm can be extracted. it can. By monitoring the state of the optical signal received by the optical receiver 1001 (reception level, error rate, etc.), changes in the state of optical loss of the optical switch network 1003 can be known, and the optical switch network 1003 can be monitored. It can be carried out. Based on the obtained information, the information processing apparatus 1006 sends a signal to the optical switch network 1003 so as to change the connection state of the optical switch in some cases.

The present invention is not limited to this embodiment.

For example, as the WDM coupler 1002,
The WDM coupler that separates the wavelengths of 1.31 μm and 1.55 μm was used, but it is used for the main signal light and the supervisory signal light even when the main signal light is not 1.31 μm and the supervisory signal light is not the wavelength of 1.55 μm. The present invention can be applied by using a WDM coupler that can separate the wavelengths that are present.

In this embodiment, W is used as the light separating means.
Although the DM coupler 1002 is used, the sub-carrier in which the OAM information is modulated in advance is superimposed on the main signal light, and the WDM
OAM information can be obtained by using an optical coupler instead of a coupler, tapping a part of the main signal light, and using a receiver capable of receiving a subcarrier signal and demodulating OAM information as the optical receiver 1001. The present invention can be applied.

Further, as the light separating means, the WDM coupler 1
004 was used, but instead of using this, an optical coupler was used, the monitoring signal was embedded in the main signal light in advance by time division multiplexing in the main signal light, and part of it was tapped with the optical coupler 1001. Even if you receive using OAM and get OAM information,
The present invention can be applied. An optical coupler as a light separation means,
Although the WDM coupler is used, the present invention can be applied by using a polarization splitter. In that case, the main signal is TE deflection, O
An optical signal for transmitting AM information is polarization-multiplexed using TM polarization and transmitted, and each block is connected by a polarization maintaining fiber.
OAM information is obtained by extracting only M-polarized light. The polarization splitter can be realized by using a crystal having a birefringence such as LiNbO ₃ .

An embodiment of the 21st invention will be described.
A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second group. The twenty-first invention is limited to a wavelength separating means such as a WDM coupler as the light separating means used in the twentieth invention, and its embodiment is shown in the embodiment of the twentieth invention.

The effect of the following limitation is shown.

WDM coupler 1004 is used as the light separating means.
By using, there is no branch loss, so there is little change in the loss budget given to the main signal system, and it can be economically introduced into the existing network. Also, WDM coupler 10
No. 02 removes the light of the wavelength used for the supervisory signal, so the light after passing through the WDM coupler 1002 has no optical signal other than the main signal superposed, and forms a closed system. Therefore, monitoring is easy.

The twenty-second embodiment of the invention limits the optical function circuit means described in the seventeenth embodiment of the invention to an optical switch circuit network. As the optical switch network, the optical switch network 1 described in the embodiment of the first invention is used.
02 can be used.

The twenty-third embodiment of the invention limits the optical functional circuit means of the optical network device described in the eighteenth embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The twenty-fourth embodiment of the present invention limits the optical function circuit means of the optical network device described in the nineteenth embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The twenty-fifth embodiment of the present invention limits the optical functional circuit means of the optical network device described in the twentieth embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The twenty-sixth embodiment of the invention limits the optical function circuit means of the optical network device described in the twenty-first embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

An embodiment of the 27th invention will be described.
The twenty-seventh embodiment of the invention can be realized by using the node 1021 in FIG. 10 showing the twentieth embodiment of the invention, and its realizing method has been described in the twentieth embodiment of the invention.

The twenty-eighth embodiment of the invention will be described.
The twenty-eighth embodiment of the invention is to limit the optical network equipment used in the optical network OAM information transmission system of the twenty-seventh invention to an optical switch circuit network in particular. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The twenty-ninth embodiment of the invention will be described with reference to FIG.

FIG. 11 is a block diagram showing an embodiment of the 29th invention. In FIG. 11, reference numeral 1121 represents an optical network node (optical network device). 110
3 is an optical switch circuit network (optical functional circuit means), 1101 is an optical receiver capable of receiving light with a wavelength of 1.55 μm (first)
Optical receiving means), 1112 is an optical receiver (second optical receiving means) capable of receiving light having a wavelength of 1.55 μm, 110
7, 1108 are optical transmission lines, 1105 is an optical transmitter (first optical transmitting means) for transmitting light having a wavelength of 1.55 μm, 11
Reference numeral 09 denotes an optical transmitter (second optical transmission means) for transmitting light having a wavelength of 1.55 μm, and 1104 and 1110 denote directional coupling type couplers that couple two input lights with an optical power ratio of 1: 1. It is an optical branching device (optical coupler). 1102, 1111
Of the input light is 1.31 μm wavelength and 1.5
It is a WDM coupler that separates and outputs light having a wavelength of 5 μm. 1104 is used as a coupler (second optical superimposing means) for the optical signal from the output end of the WDM coupler 1111 and the optical signal from the output end of the optical transmitter 1112. 11
Reference numeral 10 is used as a coupler (first optical superimposing means) for the output signal from the WDM coupler 1102 and the optical signal from the optical transmitter 1109. 1102 is a WD connected so as to output 1.31 μm light to the optical coupler 1110 and 1.55 μm light to the optical receiver 1101.
It is an M coupler (first light separating means). 1111 is
The light of 1.31 μm is output to the optical coupler 1104,
It is a WDM coupler (second optical separating means) connected so as to output 1.55 μm light to the optical receiver 1112. Reference numeral 1106 denotes an information processing device (information processing means) that processes a signal obtained from the optical receiver 1101, and a workstation can be used. As the optical switch circuit network 1103, the optical switch circuit network 102 and the U optical switch circuit network used in the first invention can be used.

In addition to the main signal light having a wavelength of 1.31 μm, OAM information is transmitted to the optical transmission line 1107 using an optical signal having a wavelength of 1.55 μm (hereinafter referred to as OAM signal light).
The light arriving at the WDM coupler 1102 is separated into OAM signal light and main signal light, and the main signal light is the optical switch circuit network 1
The OAM signal light is input to the optical receiver 103 and is input to the optical receiver 1101. OA received using the optical receiver 1101
The M signal is processed by the information processing device 1106, and the OAM
The information is rewritten and input to the optical transmitter 1105. A new (rewritten) O output from the optical transmitter 1105
In the optical coupler 1104, the AM signal light is superimposed on the main signal light that has passed through the optical switch circuit network 1103, input to the optical transmission line 1108, and transmitted to another node. At the node where this optical signal is transmitted, 1.31 μm and 1.
Using a WDM coupler that separates the wavelength of 55 μm,
Only OAM signal light with a wavelength of 1.55 μm can be extracted and OAM information can be obtained. In addition, an optical signal having a wavelength of 1.55 μm for monitoring the optical switch network 1103 is transmitted from the optical transmitter 1109, and the optical coupler 1110 is used.
At this time, the main signal light of 1.31 μm from the WDM coupler 1102 is superimposed and input to the optical switch network 1103. The light output from the optical switch network 1103 is W
The input light to the DM coupler 1111 is 1.
The main signal light of 31 μm is output to the optical coupler 1104, and the supervisory signal light of 1.55 μm is output to the optical receiver 1112. After removing the OAM signal light transmitted through the optical transmission line 1107 by the WDM coupler 1102,
The OAM transmitted through the main signal light and the optical transmission line 1108 after the main signal light and the supervisory signal light of the optical switch circuit network 1103 are superimposed and the WDM coupler 1111 removes the supervisory signal light of the optical switch circuit network 1103. Since the signal light is superposed, the three signals are not mixed with each other. The optical switch circuit network 1103 can be monitored by the optical level of the supervisory signal light received by the optical receiver 1112. Further, by monitoring the state of the optical signal received by the optical receiver 1101 (reception level, error rate, etc.), the disconnection state of the optical transmission line 1107 can be known.

The main signal light and the OAM signal light are wavelength division multiplexed and transmitted, and the WDM coupler 1102 and the optical receiver 110 are used.
1, the information processing apparatus 1106, the optical transmitter 1105, the optical coupler 1104 and the optical coupler 1104 are connected as shown in FIG.
Can send and receive OAM signals for optical networks,
Further, the optical transmission line and the optical switch circuit network can be monitored.

The present invention is not limited to this embodiment.

For example, as the WDM coupler 1102,
Although the WDM coupler that separates the wavelengths of 1.31 μm and 1.55 μm is used, even when the main signal light is not 1.31 μm and the supervisory signal light is not 1.55 μm, the main signal light and O
The present invention can be applied by using a WDM coupler capable of separating the wavelength used for the AM signal light.

Further, in this embodiment, W is used as the light separating means.
Although the DM coupler 1102 and the WDM coupler 1111 are used, the subcarrier in which the OAM information is modulated is previously superimposed on the main signal light, and an optical coupler is used instead of the WDM coupler to tap a part of the main signal light. , Optical receiver 11
01, 1105 can receive subcarrier signals,
By using a receiver that can demodulate OAM information,
AM information can be obtained and the present invention can be applied.

Further, TE polarized light is used for transmission of the main signal and TM polarized light is used for transmission of the OAM signal, and WDM couplers 1102 and 111 are used as optical separation means.
It is possible to separate the OAM signal light and input it to the information processing apparatus 1103 by using a polarization splitter without using 1. For example, the output light of the optical switch network 1103 is adjusted by using a polarization controller so that it is always TE polarized light, the TM polarized light is transmitted from the optical transmitter 1105 for transmission, and each block is The present invention can be applied even if a polarization maintaining fiber is used as the optical fiber to be connected.

In this embodiment, the optical coupler 1110 and the optical coupler 1104 are used as the light separating means.
The present invention can be applied even when superposed by using a DM coupler.

In the embodiment, all of the OAM signal light transmitted through the optical transmission line 1107, the supervisory signal light of the optical switch circuit network 1103, and the OAM signal light transmitted through the optical transmission line 1108 are set to 1 An optical signal having a wavelength of 0.55 μm was used, but WDM coupler 1102 and WDM coupler 1111 were used.
The present invention can be applied even if these three signals do not use the same wavelength as long as they can be separated by.

In the thirtieth invention, the wavelength belonging to the first group is 1.31 μm, the wavelength belonging to the second group is 1.55 μm, and the wavelength belonging to the third group is 1.35 μm.
A wavelength of 55 μm can be used. As the embodiment of the structure of the thirtieth invention, the structure of FIG. 11 shown in the embodiment of the twenty-ninth invention can be used. A thirtieth invention is the same as the twenty-ninth invention, wherein the light separation means is a wavelength separation means (WDM
Couplers and the like).

The advantages of using the WDM coupler will be described below.

In the case of the method of using the internal optical coupler and the subcarrier technique of the twenty-ninth invention, there is a branch loss due to the branch, but in the thirtieth invention, the WDM coupler 110
2. Using WDM coupler 1111, main signal light and OA
Since it is separated into the signal light for transmitting M information, there is no branching loss, and there is little change in the loss budget of the main signal system due to the introduction of the present invention. Further, since the wavelength division multiplexing technique is used, it is not necessary to change the existing transmitter so that the subcarriers can be superposed as in the case of the method of using the inner optical coupler and the subcarrier technique of the 29th embodiment. There is an advantage that it can be introduced economically. Further, when the wavelength division multiplexing technique is used, it is possible to freely increase the capacity of the OAM line as compared with the case where the optical coupler and the subcarrier technique are used.
In addition, even if you want to upgrade the OAM line after installation, you can upgrade independently from the main signal system because an optical transmitter different from the main signal system optical transmitter is used. is there.

The 31st embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing an embodiment of the thirty-first invention. The thirty-first invention limits the light separating means used in the first invention to an optical branching device (optical coupler). As an optical branching means, the optical coupler 10 in FIG.
4 can be used. By using the optical branching device, it is not necessary to use a polarization maintaining fiber or a polarization controller as the light separating means, and an optical network device can be economically constructed.

An embodiment of the thirty-second invention will be described with reference to FIG. FIG. 1 is a block diagram showing an embodiment of the thirty-second invention. A thirty-second invention limits the optical receiving means (optical receiver 101) used in the first invention to an optical receiver for receiving an optical signal on which subcarriers are superimposed. As the optical receiving means, a receiving means is connected which is capable of demodulating the signal light modulated into the subcarriers by extracting only the subcarrier frequency component by passing the signal received by the APD or the like through a band pass filter for extracting the subcarrier frequency. Optical receivers can be used. Even after the subcarrier signal is extracted from the optical signal, the ratio of subcarriers in the transmitted optical signal does not change, so it is the same from the node that passes as it is to the destination node where the main signal light is terminated. Information can be transmitted. Therefore,
As an application to send OAM information from a certain node to all the nodes that pass through as optical signals, an optical transmitter for OAM at the nodes that pass through as optical signals is compared with a configuration in which OAM signal light is transmitted and received by wavelength division multiplexing. There is an advantage that the number of optical transmitters can be saved because the number is not required.

The embodiment of the 33rd invention will be described with reference to FIG. FIG. 1 is a block diagram showing an embodiment of the 33rd invention. A thirty-third invention limits the optical receiving means (optical receiver 101) used in the thirty-first invention to an optical receiver for receiving an optical signal on which subcarriers are superimposed. As the optical receiving means, a receiving means is connected which is capable of demodulating the signal light modulated into the subcarriers by extracting only the subcarrier frequency component by passing the signal received by the APD or the like through a band pass filter for extracting the subcarrier frequency. Optical receivers can be used. Even if the subcarrier signal is extracted from the optical signal, the ratio of the subcarriers in the transmitted optical signal does not change, so the same information is sent from the node that passes as it is to the target node where the main signal light is terminated. Can be transmitted. Therefore, compared to a configuration in which OAM signal light is transmitted and received by wavelength division multiplexing for the purpose of transmitting the OAM information from a certain node as it is, to all the nodes that pass through as light, it passes through as light. There is an advantage that the number of optical transmitters can be saved because the node does not need an optical transmitter for OAM.

The thirty-fourth embodiment of the present invention limits the optical functional circuit means of the optical network device described in the thirty-first embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The thirty-fifth embodiment of the present invention limits the optical function circuit means of the optical network device described in the thirty-second embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The thirty-sixth embodiment of the present invention limits the optical functional circuit means of the optical network device described in the thirty-third embodiment of the invention to an optical switch circuit network. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The 37th embodiment of the present invention will be described with reference to FIG.

FIG. 12 is a block diagram showing an embodiment of the 37th invention. In FIG. 12, 1221, 122
2 is a node of the optical network, and 1221 is “first
Optical network device ”and 1222 represent a“ second optical network device ”. 1207 and 1208 are optical transmission lines,
1201 is an optical receiver for receiving an optical signal modulated into subcarriers, 1203 is an optical switch circuit network used in the first embodiment, 1202 is an optical power and an optical power output to an input end of the optical switch circuit network 1203. This is a directional coupling type optical splitter (coupler) in which the ratio of the optical power output to the input end of the receiver 1201 is 95: 5. 1204 and 1206 are OA
A workstation can be used in an information processing device that processes M information. Reference numeral 1205 is an optical transmitter for transmitting the main signal light, and reference numeral 1210 is a modulator for generating subcarriers modulated by the signal output from the information processing device 1206. 1209 modulates the main signal light from the optical transmitter 1205 with the signal output from the modulator 1210.

At the node 1222, the main signal light is not terminated and passes as light. The procedure for transmitting the OAM information from the node 1221 to the node 1222 will be described below. The subcarrier signal modulated by the OAM signal generated by the information processing device 1206 of the node 1221 is
It is generated using the modulator 1210. The subcarrier signal is used to modulate the optical signal from the optical transmitter 1205 and input to the optical transmission line 1207. Most of the optical signals arriving at the node 1222 are input to the optical switch network 1203 and switched and then further transmitted to other nodes. However, some optical signals are branched by the optical coupler 1202 and received by the optical coupler 1202. Input to the container 1201. This receiver first extracts a subcarrier frequency component, and demodulates an OAM signal from the extracted subcarrier frequency component. This signal is input to the information processing device 1204. In this way, the OAM information is transmitted from the node 1221 to the node 1222.
Transmitted to.

The present invention is not limited to this example.

For example, in this embodiment, the subcarrier signal is modulated by modulating the output signal of the modulator 1210 by the optical modulator 1209. However, the subcarrier signal modulated by the modulator 1210 and the optical transmission are transmitted. The present invention can also be applied by superimposing the main signal input to the optical transmitter 1205 before inputting to the optical transmitter 1205 and using a method in which the optical transmitter 1205 directly modulates the injection current.

Further, although the configuration including the optical transmitter 1205 is used as the first optical network device, the present invention can be applied by using the optical switch circuit network 102 used in the embodiment of the first invention. .

The 38th embodiment of the present invention will be described with reference to FIG.

FIG. 13 is a block diagram showing an embodiment of the 38th invention. In FIG. 13, 1321, 132
2 is a node of the optical network, 1321 represents a "first optical network device", and 1322 represents a "second optical network device". 1307 and 1308 are optical transmission lines, 1301 is an optical receiver for receiving an optical signal modulated into subcarriers, 1303 and 1305 are optical switch circuits, and 1302 is optical power output to the input end of the optical switch circuit 1303. Is a directional coupling type optical branching device (coupler) in which the ratio of the optical power output to the input end of the optical receiver 1301 is 95: 5. Optical switch network 1303, 1
As 305, the optical switch circuit network 102 used in the embodiment of the first invention can be used. 1304, 130
Reference numeral 6 denotes an information processing device that processes OAM information, and a workstation can be used. Reference numeral 1310 is a modulator that generates subcarriers modulated by the signal output from the information processing device 1306. 1309 is a modulator 131
A signal output from 0 causes the optical switch network 130
The main signal light output from 5 is modulated.

In the nodes 1321 and 1322, the main signal light is not terminated and passes as it is. The procedure for transmitting the OAM information from the node 1321 to the node 1322 will be described below. The subcarrier signal modulated by the OAM signal generated by the information processing device 1306 of the node 1321 is generated using the modulator 1310. The subcarrier signal is used to modulate the optical signal output from the optical switch network 1305 and input to the optical transmission line 1307. Most of the optical signals arriving at the node 1322 are input to the optical switch circuit network 1303 and switched and then further transmitted to another node, but some optical signals are branched by the optical coupler 1302 and received by the optical coupler 1302. Input to the container 1301. This receiver first extracts the subcarrier frequency component, and from the extracted subcarrier frequency component,
Demodulate the OAM signal. This signal is transmitted to the information processing device 130.
4 is input. In this way, the OAM information is transmitted from the node 1321 to the node 1322.

An embodiment of the thirty-ninth invention will be described with reference to FIG. FIG. 12 is a block diagram showing an embodiment of the present invention. A thirty-ninth invention is the thirty-seventh invention, wherein the OAM information of the optical network to be transmitted is limited to the identifier of the route through which the optical signal passes. The identifier is, for example,
An optical signal path from the optical network device # 1 to the optical network device # 3 through the optical network device # 2 through which the main signal light is transmitted as an optical signal, and the optical network device #
4 from the optical signal path 4 to the optical network apparatus # 5 through the optical network apparatus # 2 through which the main signal light remains as the optical signal, and in particular, the optical network apparatus # 2 through which the main signal light remains as the optical signal. In this case, it is an identifier corresponding to each optical signal path in order to identify it so as not to be mistakenly recognized. In FIG. 12, the output end of the information processing device 1206 output to the optical transmitter 1210 and the optical receiver 120.
At the input end of the information processing device 1204 to which the signal from 1 is input, only input / output of a signal of information relating to the identifier of the path through which the optical signal passes. Since the subcarrier signal is always modulated at a certain ratio of the optical signal, the subcarrier signal continues to have subcarrier information until the signal is once converted into an optical signal and then converted into an electric signal. On the other hand, since the identifier is for a path through which an optical signal passes, it is necessary to keep the same information until the signal is once converted into an optical signal and then converted into an electric signal. Therefore, it can be said that it is suitable to use the thirty-seventh invention to transmit the identifier of the route through which the optical signal passes. If the method of rewriting for each node passing through the identifier of the route through which the optical signal passes is used, it is possible that information transmission may be incorrect at a node on the way, and the method of using subcarriers for transmitting the identifier is suitable. ing. By using a method of transmitting an identifier using a subcarrier and transmitting other OAM information using another wavelength,
Since it is not necessary to put identifier information on another wavelength line in the usable band of another wavelength, the usable capacity of another wavelength increases, and the usable band of OAM information other than the identifier by another wavelength increases, The OAM information of the network will be quickly transmitted to other nodes. Therefore, quick failure recovery is possible.

The 40th embodiment of the present invention will be described with reference to FIG. FIG. 13 is a block diagram showing an embodiment of the present invention. A fortieth aspect of the invention is the thirty-eighth aspect of the invention, wherein the OAM information of the optical network to be transmitted is limited to the identifier of the route through which the optical signal passes. The identifier is, for example,
An optical signal path from the optical network device # 1 to the optical network device # 3 through the optical network device # 2 through which the main signal light is transmitted as an optical signal, and the optical network device #
4 from the optical signal path 4 to the optical network apparatus # 5 through the optical network apparatus # 2 through which the main signal light remains as the optical signal, and in particular, the optical network apparatus # 2 through which the main signal light remains as the optical signal. In this case, it is an identifier corresponding to each optical signal path in order to identify it so as not to be mistakenly recognized. In FIG. 13, the output end of the information processing device 1304 output to the optical transmitter 1310 and the optical receiver 130.
At the input end of the information processing device 1306 to which the signal from 1 is input, only input / output of a signal of information regarding the identifier of the path through which the optical signal passes is performed. The explanation of the effect of limiting the OAM information to the identifier of the path through which the optical signal passes is the same as the explanation in the embodiment of the 39th invention.

The 41st embodiment of the present invention will be described with reference to FIG.

FIG. 14 is a block diagram showing an embodiment of the present invention. In FIG. 14, 1421 represents an optical network node (optical network device). 1404 is an optical switch circuit network (optical functional circuit means), 1407 is 1.5
An optical receiver capable of receiving light with a wavelength of 5 μm (first optical receiving means), 1410 is an optical receiver capable of receiving light with a wavelength of 1.55 μm (second optical receiving means), and 1408 is An optical receiver capable of demodulating an optical signal modulated into subcarriers (third optical receiving means), 1413 and 1414 are optical transmission lines, and 1409 is an optical transmitter (first optical transmitter for transmitting light having a wavelength of 1.55 μm). 2 is an optical transmitter), and 1411 is an optical transmitter (first optical transmitter) for transmitting light having a wavelength of 1.55 μm. Reference numeral 1403 denotes a directional coupling type optical coupler (first optical superimposing means) which couples two input lights with a power ratio of 1: 1 and 1406 denotes two input lights having a power of 1: 1. This is a directional coupling type optical coupler (second light superimposing means) that couples at a ratio of. 1402 is a light coupler 140
3 is a directional coupling type optical branching device (third optical demultiplexing means) that branches so that the ratio of the optical power output to the optical signal No. 3 and the optical power output to the optical receiver 1408 is 95: 5. 1401,
Reference numeral 1405 denotes a WDM that separates and outputs the input light having a wavelength of 1.31 μm and the light having a wavelength of 1.55 μm.
It is a coupler. Reference numeral 1401 denotes a WDM coupler (first optical separating means) connected so as to output 1.31 μm light to the optical coupler 1402 and output 1.55 μm light to the optical receiver 1407. . 1405 is 1.
The light of 31 μm is output to the optical coupler 1406, and 1.
WDM that outputs 31 μm light toward the optical receiver 1410
It is a coupler (second light separating means). Reference numeral 1412 denotes an information processing device (information processing means) that processes signals obtained from the optical receivers 1407, 1408, and 1410, and a workstation can be used. As the optical switch circuit network 1404, the same optical switch circuit network as the optical switch circuit network 102 used in the first invention can be used.

Using the node configuration of FIG. 14, the main signal light is transmitted by using light having a wavelength of 1.31 μm, and the OAM signal light is transmitted by using light having a wavelength of 1.55 μm. Information such as an identifier of a route through which an optical signal has passed is superimposed on the main signal light by using subcarriers. The optical signal transmitted from the optical transmission line 1413 is separated into the main signal light and the OAM signal light in the WDM coupler 1401, and the main signal light is output to the optical coupler 1402. The OAM signal light is received by the optical receiver 1407 and input to the information processing device 1412. Optical receiver 14
The received signal input from 07 is processed by the information processing device 1412 as OAM information. Optical coupler 140
The signal light of 1.31 μm input to the 2 is the optical coupler 14.
The data is partially tapped by 02 and input to the optical receiver 1408. The optical signal modulated into subcarriers of the optical signal input to the optical receiver 1408 is demodulated and the information processing device 141
2 and OAM information such as an identifier is processed. On the other hand, the monitoring optical signal having a wavelength of 1.55 μm output from the information processing device 1412 via the optical transmitter 1409 is input to the optical coupler 1403, and is superposed on the main signal light having a wavelength of 1.31 μm to switch the optical switch. It is input to the network 1404. The optical signal output from the optical switch network 1404 is input to the WDM coupler 1405, and is separated into a supervisory signal light having a wavelength of 1.55 μm and a main signal light having a wavelength of 1.31 μm, and a wavelength of 1.55 μm is monitored. The signal light is received by the optical receiver 14
10 and the main signal light of 1.31 μm is input to the optical coupler 1.
It is input to 406 and transmitted to the optical transmission line 1414. The monitoring signal output from the optical receiver 1410 is input to the information processing device 1412, detects an optical loss or the like of the optical switch circuit network 1404, and determines whether the drive voltage or the like is normal.
As a result of the processing of the OAM information, the OAM information to be transmitted to the next node is input to the optical transmitter 1411 and then 1.5.
It is converted into an optical signal of 5 μm, superposed on the main signal light output from the WDM coupler 1405 in the optical coupler 1406, and input to the optical transmission line 1414 connected to the next node. At the next node where this optical signal is transmitted, by using the WDM coupler that separates the wavelength of 1.31 μm and the wavelength of 1.55 μm, only the OAM signal light of the wavelength of 1.55 μm is extracted. OAM
You can get information.

By using the node configuration shown in FIG. 14, the optical switching circuit network 1404 is switched to the optical state at the node 1421 as it is and is transmitted to the next node, but the OAM information is transmitted to the other nodes. It is also possible to monitor the optical switch circuit network 1404 through which the main signal light passes as it is. Further, as shown in FIG. 14, the WAM coupler 1401 separates the OAM signal light, and only the main signal light is input to the optical coupler 1402, so that the optical level of the OAM signal light received by the optical receiver 1407 is lowered. As an optical receiver 1407,
An optical receiver with lower sensitivity can be used, and an economical system can be configured.

The present invention is not limited to this embodiment.

For example, instead of using the optical couplers 1403 and 1406 as the first light superimposing means and the second light superimposing means, a WDM coupler for coupling light having wavelengths of 1.31 μm and 1.55 μm may be used. The present invention can be applied.

In the present invention, an optical signal having a wavelength of 1.31 μm is used as the main signal and an optical signal having a wavelength of 1.55 μm is used as the OAM signal, but any optical signal that can be separated into the main signal light and the OAM signal light can be used. For example, the present invention can be applied by using a combination of other wavelengths.

Further, in the embodiment, the OAM signal is transmitted or separated by using the wavelength division multiplexing technique, but the polarization multiplexing technique can also be used. The present invention can be applied even if a polarization controller and a polarization splitter are used as the light splitting means. In that case, the main signal is TE-polarized, and the optical signal for transmitting the OAM information is polarization-multiplexed and transmitted using TM-polarization, each block is connected by a polarization-maintaining fiber, and only the TM-polarized light is extracted to OAM. get information. As the polarization controller, a device that applies pressure to the fiber to change the polarization and controls the polarization can be used. As the polarization splitter, for example, LiNbO 2 can be used.
₃ can be realized by using a crystal having such birefringence.

Further, in the embodiment, the optical receiver 1408 capable of demodulating the subcarrier signal superposed on the main signal is used as the third optical receiving means, but the optical receiver 1408 is not used but the main signal is used as the main signal. Even if an optical receiver that can receive SDH frames and obtain OAM information from SOH is used as a third optical receiving means by using a system in which OAM information of an optical network is placed on a portion of SOH using SDH frames. The present invention can be applied.

The 42nd embodiment of the present invention will be described with reference to FIG. The embodiment of the forty-second invention has the configuration of FIG. 14 shown in the embodiment of the forty-first invention, and its description will be given in the forty-first
Examples of the invention of The 42nd invention, as used in the 41st invention, comprises:
A WDM coupler or the like (WDM coupler 1
401, 1405) wavelength separating means can be used. An optical branch is used as the third optical separating means, and a signal received by an APD or the like is passed through a band pass filter for extracting the subcarrier frequency as the third optical receiving means to extract only the subcarrier frequency component. It is possible to use an optical receiver to which receiving means capable of demodulating the signal light modulated into subcarriers is connected. A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second and third groups.

The effects of such a limitation will be described below.

In the case of the method using the polarization division multiplexing technique of the forty-first aspect of the invention, polarization control and the like are required, which complicates the apparatus, but in the forty-second aspect, the WDM coupler 140 is used.
1. Using WDM coupler 1405, main signal light and OA
Since it is separated from the signal light for transmitting M information, the device can be simplified and the system can be economically constructed.

The forty-third invention will be described with reference to FIG.

FIG. 15 is a block diagram showing an embodiment of the present invention. In FIG. 15, reference numeral 1521 represents an optical network node (optical network device). 1504 is an optical switch circuit network (optical functional circuit means), and 1507 is 1.5.
An optical receiver capable of receiving light having a wavelength of 5 μm (first optical receiving means), 1510 is an optical receiver capable of receiving light having a wavelength of 1.55 μm (second optical receiving means), and 1508 is An optical receiver capable of demodulating an optical signal modulated into subcarriers (third optical receiving means), 1513 and 1514 are optical transmission lines, and 1509 is an optical transmitter (first optical transmitter for transmitting light having a wavelength of 1.55 μm). 2 is an optical transmitting means), 1511 is an optical transmitter (first optical transmitting means) for transmitting light having a wavelength of 1.55 μm, 1
Reference numeral 503 denotes a directional coupling type optical coupler (first light superimposing means) which combines two input lights with a power ratio of 1: 1 and outputs the combined light. : 1
This is a directional coupling type optical coupler (second light superimposing means) that couples and outputs at a power ratio of. Reference numeral 1502 denotes the optical power for outputting light to the optical coupler 1503 and the optical receiver 1508.
It is a directional coupling type optical branching device (third optical separating means) which is branched and connected so that the ratio of the optical power output to is 95: 5. Reference numerals 1501 and 1505 denote WDM couplers that split the input light into light having a wavelength of 1.31 μm and light having a wavelength of 1.55 μm, and output the split light. 1501
Is a WDM coupler (first optical separation means) connected so as to output 1.31 μm light to the optical coupler 1502 and 1.55 μm light to the optical receiver 1507. 1505 is an optical coupler 15 for transmitting 1.31 μm light.
The optical receiver 151 outputs the light of 1.31 μm to the optical receiver 151.
It is a WDM coupler (second optical separating means) connected so as to output toward 0. 1512 is an optical receiver 150
The workstation can be used as an information processing device (information processing means) that processes signals obtained from the wireless communication devices 7, 1508, and 1510 and sends the OAM information to the optical transmitter 1509 and the optical transmitter 1510. As the optical switch circuit network 1504, the same optical switch circuit network as the optical switch circuit network 102 used in the first invention can be used.

Using the node configuration shown in FIG. 15, the main signal light is transmitted using light having a wavelength of 1.31 μm and the OAM signal light is transmitted using light having a wavelength of 1.55 μm. Information such as an identifier of a route through which an optical signal has passed is superimposed on the main signal light by using subcarriers. The optical signal transmitted from the optical transmission line 1513 is separated into the main signal light and the OAM signal light in the WDM coupler 1501, and the main signal light is output to the optical coupler 1502. The OAM signal light is received by the optical receiver 1507 and input to the information processing device 1512. Optical receiver 15
The received signal input from 07 is processed by the information processing device 1512 for OAM information. Optical coupler 150
The signal light of 1.31 μm input to the 2 is the optical coupler 15.
The data is partially tapped by 02 and input to the optical receiver 1508. The information processing device 151 demodulates the optical signal modulated into subcarriers of the optical signal input to the optical receiver 1508 and demodulated.
2 and OAM information such as an identifier is processed. On the other hand, the monitoring optical signal having a wavelength of 1.55 μm output from the information processing device 1512 via the optical transmitter 1509 is input to the optical coupler 1503 and is superimposed on the main signal light having a wavelength of 1.31 μm to be used as an optical switch. It is input to the network 1504. The optical signal output from the optical switch network 1504 is input to the WDM coupler 1505, separated into a monitoring signal light having a wavelength of 1.55 μm and a main signal light having a wavelength of 1.31 μm, and monitoring a wavelength of 1.55 μm. The signal light is the optical receiver 15
10 and the main signal light of 1.31 μm is input to the optical coupler 1.
Input to 506. The monitoring signal output from the optical receiver 1510 is input to the information processing device 1512, detects optical loss or the like of the optical switch circuit network 1504, and determines whether the drive voltage or the like is normal. As a result of processing the OAM information, the OAM information transmitted to the next node is the optical transmitter 1
The signal is input to 511, converted into an optical signal of 1.55 μm, superposed on the main signal light output from the WDM coupler 1505 in the optical coupler 1506, and input to the optical transmission line 1514 connected to the next node. At the node where this optical signal is transmitted, it is possible to extract only the OAM signal light having the wavelength of 1.55 μm by using the WDM coupler that separates the wavelengths of 1.31 μm and 1.55 μm.
AM information can be obtained.

By using the node configuration shown in FIG. 15, the optical switching circuit network 1504 is switched as optical at the node 1521 and is sent to the next node even though it is transmitted to the next node. Can be exchanged. It is also possible to monitor the optical switch network 1504 through which the main signal light passes as it is.

The present invention is not limited to this embodiment.

For example, instead of using the optical couplers 1503 and 1506 as the first light superimposing means and the second light superimposing means, a WDM coupler for coupling light having wavelengths of 1.31 μm and 1.55 μm may be used. The present invention can be applied.

Further, in the embodiment, the OAM signal is transmitted or separated by using the wavelength division multiplexing technique, but the polarization multiplexing technique can also be used. The present invention can be applied even if a polarization controller and a polarization splitter are used as the light splitting means. In that case, the main signal is TE-polarized, and the optical signal for transmitting the OAM information is polarization-multiplexed and transmitted using TM-polarization, each block is connected by a polarization-maintaining fiber, and only the TM-polarized light is extracted to OAM. get information. As the polarization controller, a device that applies pressure to the fiber to change the polarization and controls the polarization can be used. As the polarization splitter, for example, LiNbO 2 can be used.
₃ can be realized by using a crystal having birefringence as described below.

Further, according to the present invention, an optical signal having a wavelength of 1.31 μm is used as a main signal and an optical signal having a wavelength of 1.55 μm is used as an OAM signal, and a WDM coupler for separating a wavelength of 1.31 μm and a wavelength of 1.55 μm is used. The main signal light and OAM
The present invention can be applied even if a WDM coupler that separates other wavelengths is used as long as it can be separated as signal light.

As the third optical receiving means, an optical receiver 150 capable of demodulating the subcarrier signal superimposed on the main signal.
8 is used, but SDH frame is used as the main signal and S
An SDH frame can be received without using the optical receiver 1508 as the third optical receiving means by using a system in which the OAM information of the optical network is placed in a part of the OH, and the OAM can be received from the SOH.
The present invention can be applied even when an optical receiver capable of obtaining information is used.

The 44th embodiment of the present invention will be described with reference to FIG. FIG. 15 is a block diagram showing an embodiment of the present invention. The forty-fourth embodiment of the present invention has the configuration shown in FIG.
Examples of the invention of The 44th invention, as used in the 43rd invention, comprises:
The wavelength separating means (WDM couplers 1501 and 1505) such as a WDM coupler is used as the optical separating means. A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second group and the wavelength belonging to the third group.

The advantages of the configuration of FIG. 15 using the WDM coupler will be described below.

In the case of the method using the polarization division multiplexing technique of the forty-third aspect of the invention, polarization control or the like is required, which complicates the apparatus. However, in the forty-fourth aspect, the WDM coupler 150 is used.
1. Using the WDM coupler 1505, main signal light and OA
Since it is separated from the signal light for transmitting M information, the device can be simplified and the system can be economically constructed.

An embodiment of the forty-fifth invention will be described with reference to FIG. FIG. 3 is a block diagram showing an embodiment of the present invention. As an embodiment of the forty-fifth invention, in FIG. 3, as the optical transmission means (optical transmitter 301), an optical transmitter for superimposing a signal on a subcarrier and transmitting it can be used. For example, when a signal obtained by modulating an OAM signal with a frequency of 1 MHz as a carrier is called a subcarrier signal, the frequency of 1 MHz and the OAM signal can be electrically superposed by an electric multiplier. If this is directly modulated using a semiconductor laser diode, an optical transmitter 301 that sends out a subcarrier signal can be configured. The subcarrier is superimposed on the electrical signal of the main signal, and the subcarrier is used to perform modulation with a degree of modulation that does not affect the reception of the main signal light at the receiving node, and the frequency of the subcarrier is also at the receiving node. A frequency outside the frequency band of the main signal is used to the extent that it does not affect the reception of the main signal light. By using the forty-fifth aspect, the OAM signal of the optical network can be transmitted from the node through which the optical signal passes as it is. When the subcarrier frequency is changed by the node transmitting the OAM information and the subcarrier multiplex transmission is performed, the receiving node receives the subcarrier multiplexed light, and then the OAM information is discriminated by the subcarrier frequency filter. The OAM information can be received by being distinguished by the source node of

When subcarriers are used, it is difficult to remove the subcarrier signals that have been once superimposed. Therefore, when transmitting the identifier of the path through which the optical signal passes, it is erroneous if the subcarriers are used as means for transmitting identifier information. Information transmission can be prevented.

The 46th embodiment of the present invention will be described with reference to FIG.

FIG. 16 is a block diagram showing an embodiment of the present invention. In FIG. 16, 1621 is an optical network node (optical network device). 1602 is an optical switch circuit network (optical functional circuit means), 1603, 160
6 is an optical transmission line, 1601 is a subcarrier
A modulator (modulator means) for amplitude modulation using
Is a modulator (optical signal modulating means) that modulates an input optical signal, and here, a modulator using the electro-optical effect of LiNbO ₃ is used. Reference numeral 1605 denotes an information processing device (information processing means) that processes OAM information, and a workstation can be used. As the optical switch network 1602,
Optical switch network 10 used in the embodiment of the first invention.
The same optical switch network as 2 can be used. The optical modulator 1604 modulates the subcarriers, and the modulation degree is such that the reception of the main signal is not affected at the reception node of the main signal light, and the frequency of the subcarriers is A frequency outside the frequency band of the main signal is used to the extent that reception of the main signal is not affected at the reception node of the main signal.

Since the optical signal passes through the optical switch network 1602 as it is, the switch state in the optical switch network 1602 is changed when the optical modulator 1604 and the optical transmitter 1601 are not connected. OAM information such as commands cannot be transmitted to other nodes.

However, by using the configuration as shown in FIG. 16, it is possible to transmit the subcarrier signal having the OAM information so that the reception node does not affect the reception of the main signal. At the node where this optical signal is transmitted, only the target subcarrier frequency is extracted using a band pass filter, and a demodulator capable of demodulating the OAM signal modulated at the transmitting node is used to output the OAM signal. Can be demodulated. Therefore, the OAM signal of the optical network can be transmitted from the node through which the optical signal passes as it is.

The present invention is not limited to this embodiment.

For example, in the embodiment, an optical modulator made of LiNbO ₃ is used as the optical signal modulating means (optical modulator 1604), but other optical signals such as a semiconductor EA modulator are used as optical signals. The present invention can be applied if it can be modulated.

In the embodiment, amplitude modulation is used as the subcarrier modulation method, but a modulation index that does not affect reception of the main signal system is used, and frequency modulation, phase modulation, etc. are used. However, the present invention can be applied.

Further, although the optical switch network 1602 is used as the optical functional circuit means, the present invention can be applied by using an optical amplifier such as an erbium-doped fiber amplifier or a semiconductor optical amplifier.

The 47th embodiment of the present invention will be described with reference to FIG.

FIG. 17 is a block diagram showing an embodiment of the present invention. In FIG. 17, reference numeral 1721 denotes an optical network node (optical network device). 1702 is an optical switch circuit network (optical functional circuit means), 1703, 170
6 is an optical transmission line, 1701 is a subcarrier
A modulator (modulator means) for amplitude modulation using
Is a modulator (optical signal modulating means) that modulates an input optical signal, and here, a modulator using the electro-optical effect of LiNbO ₃ is used. Reference numeral 1705 denotes an information processing device (information processing means) that processes OAM information, and a workstation can be used. As the optical switch network 1702,
Optical switch network 10 used in the embodiment of the first invention.
The same optical switch network as 2 can be used. The optical modulator 1704 modulates the subcarriers, but the modulation degree is such that the reception of the main signal is not affected at the reception node of the main signal light, and the frequency of the subcarriers is A frequency outside the frequency band of the main signal is used to the extent that reception of the main signal is not affected at the reception node of the main signal.

Since the optical signal passes through the optical switch network 1702 as it is, an instruction to change the switch state of the optical switch network 1702 when the optical modulator 1704 or the modulator 1701 is not connected. O such as
AM information cannot be transmitted to other nodes.

However, by using the configuration as shown in FIG. 17, it is possible to transmit a subcarrier signal having OAM information so that reception of the main signal is not affected at the receiving node. At the node where this optical signal is transmitted, the OAM signal can be obtained by extracting the subcarrier frequency component using a band pass filter and using a demodulator capable of demodulating the modulated OAM signal. it can. Therefore, from the node through which the optical signal passes as it is to the optical network OA
M signals can be transmitted.

The present invention is not limited to this embodiment.

For example, in the embodiment, an optical modulator made of LiNbO ₃ is used as the optical signal modulating means (optical modulator 1704), but other optical signals such as a semiconductor EA modulator are used as optical signals. The present invention can be applied if it can be modulated.

In the embodiment, amplitude modulation is used as the subcarrier modulation method. However, if a modulation index that does not affect reception of the main signal system is used, frequency modulation, phase modulation or the like may be used. However, the present invention can be applied.

Although the optical switch circuit network 1702 is used as the optical functional circuit means, the present invention can be applied to an optical amplifier such as an erbium-doped fiber amplifier or a semiconductor optical amplifier.

The 48th embodiment of the present invention will be described with reference to FIG.

FIG. 18 is a block diagram showing an embodiment of the present invention. The wavelength of the main signal light transmitted from the optical transmission line 1806 is assumed to be 1.31 μm. In FIG. 18, 1821 is an optical network node (optical network device). 1802 is an optical switch circuit network (optical functional circuit means), 1803 and 1806 are optical transmission lines, 1801
Is an optical transmitter (optical transmitting means) for transmitting light having a wavelength of 1.55 μm, and 1804 is a directional coupling type optical coupler which combines two input lights with a power ratio of 1: 1 and outputs the combined lights. Here, it is used as a coupler (optical superimposing means) for the input light from the optical transmission line 1806 and the input light from the output end of the optical transmitter 1801. Reference numeral 1805 denotes an information processing device (information processing means) that processes OAM information, and a workstation can be used. As the optical switch circuit network 1802, the optical switch circuit network 10 used in the embodiment of the first invention is used.
The same optical switch network as 2 can be used.

Since the optical signal passes through the optical switch network 1802 as it is, an instruction to change the switch state in the optical switch network 1802 when the optical coupler 1804 and the optical transmitter 1801 are not connected. It is not possible to transmit OAM information such as "etc." to other nodes.

However, in the optical network device of the present invention, the OAM information from the information processing device 1805 is converted into light having a wavelength (1.55 μm) different from the main signal light (1.31 μm) by using the optical transmitter 1801. By superimposing this and the main signal light by the optical coupler 1804, it becomes possible to transmit the OAM signal in addition to the main signal. At the node where this optical signal is transmitted, the OAM signal can be extracted by using the WDM coupler that separates the wavelength of 1.31 μm and the wavelength of 1.55 μm.

The present invention is not limited to this embodiment.

For example, although the optical coupler 1804 is used as the optical superimposing means in the embodiment, the present invention can be applied by superimposing the wavelength of the main signal light and the wavelength of the OAM signal light using the WDM coupler. .

Further, although the optical switch network 1802 is used as the optical functional circuit means, the present invention can be applied by using an optical amplifier such as an erbium-doped fiber amplifier or a semiconductor optical amplifier.

Further, although the optical transmitter 1801 is used as the optical transmitting means in the embodiment, an optical transmitter in which the polarization of the optical signal to be transmitted is a polarization orthogonal to the main signal light is used, and the main signal light and the OA
The present invention can be applied even when polarization multiplexing is performed with M signal light.

An embodiment of the 49th invention will be described.
The 49th invention limits the use of an optical switch circuit network as the optical function circuit means used in the 45th invention. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The forty-ninth embodiment of the invention can use the same as that shown in the forty-fifth invention of which the description is given in the forty-fifth invention.

An embodiment of the fiftieth invention will be described.
The fiftieth invention limits the use of an optical switch circuit network as the optical function circuit means. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The 50th embodiment of the present invention can be the same as that shown in the 46th embodiment of the invention, and its description is given in the 46th embodiment of the invention.

An embodiment of the fifty-first invention will be described.
The fifty-first invention limits the use of an optical switch circuit network as the optical functional circuit means. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The embodiment of the fifty-first invention is the same as that shown in the embodiment of the forty-seventh invention, and the description thereof is given in the embodiment of the forty-seventh invention.

An embodiment of the fifty-second invention will be described.
The 52nd invention limits the use of an optical switch circuit network as the optical function circuit means. The embodiment of the 52nd invention is the same as that shown in the embodiment of the 48th invention, and the description thereof is given in the embodiment of the 48th invention. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used.

The 53rd embodiment of the present invention will be described with reference to FIG.

FIG. 19 is a block diagram showing an embodiment of the present invention. In FIG. 19, 1929 is an optical network node (optical network device). 1901, 1
902, ..., 1908, 1909, 1910, ...
Reference numeral 1916 denotes an optical transmission line that transmits the main signal light using light having a wavelength of 1.31 μm and the OAM signal light using light having a wavelength of 1.55 μm. Reference numeral 1928 is an optical switch circuit network (optical functional circuit means). Optical switch network 1928
As the above, the same optical switch circuit network as the optical switch circuit network 102 used in the embodiment of the first invention can be used.
The main signal light is switched as it is and transmitted to another node. Reference numeral 1925 denotes an optical selector (selection means) that selects one output light from the eight input lights, and a 1 × 8 optical switch configured by connecting three 1 × 2 optical switches in a tree shape can be used. it can. . As an optical switch, LiNb
An optical switch utilizing the electro-optic effect of O ₃ is used. 1
917, 1918, ... 1924 are input 1.31
W that separates light with wavelength of μm and light with wavelength of 1.55 μm
DM coupler (m number of light separation means), 1.31μ
The light having a wavelength of m is output to the optical switch network 1928, and the light having a wavelength of 1.55 μm is output to the optical selector 1925. Reference numeral 1926 denotes an optical receiver (optical receiving means) capable of receiving light having a wavelength of 1.55 μm.
Reference numeral 1927 denotes an information processing device (information processing means) for processing OAM information of the optical network, which uses a workstation. The OAM information transmitted through 1901, 1902, ... 1908 is superimposed on the OAM information at the transmitting node so that the same OAM information is transmitted. 1929 is an optical network node. OAM information transmitted to 1901 to 1908 has the same content, and OAM information that is not information unique to each optical transmission line such as a command to a node and OAM information of each optical transmission line of 1901 to 1908 are time division multiplexed. Has been done.

In the system in which the main signal light is transmitted as an optical signal having a wavelength of 1.31 μm and the OAM signal is transmitted as an optical signal having a wavelength of 1.55 μm, WDM couplers 1917 to 1917 are used.
It is possible to use 24 to extract only the OAM signal with a wavelength of 1.55 μm. O extracted from each optical transmission line
The AM signal is selected by the optical selector 1925 and input to the optical receiver 1926. The received OAM signal is input to the information processing device 1927, and the information processing device 1927 processes the OAM information.

By using such a configuration, O to the optical network node through which the main signal light passes as light is transmitted.
It becomes possible to transmit AM information. Also, the optical selector 1925
Since it is possible to select an optical transmission line for obtaining OAM information by using, even when a failure occurs in any optical transmission line, the optical selector 1925 is switched to an optical transmission line in which no failure has occurred. By switching, it is possible to always receive the OAM signal. For example, now the optical selector 19
25 is assumed to select the OAM signal light from the optical transmission line 1901. When a failure occurs in the optical transmission lines 1901 and 1902, the optical receiver 1926 cannot receive the OAM signal light. However, the OAM signal light can be obtained from the OAM optical transmission line 1908 by switching the optical selector 1925 so as to select the OAM signal light of the optical transmission line 1908 in which no failure has occurred. If the optical selector 1925 is not used,
The optical receiver 1926 is provided for the optical transmission line (8 in the case of the embodiment).
Although it has to be prepared, the number of optical receivers may be one because the configuration selected by the optical selector is used, the number of optical receivers to be used can be reduced, and the cost can be reduced.

The present invention is not limited to this embodiment.

For example, in the embodiment, an optical selector of LiNbO ₃ is used as the selection means (optical selector 1925), but an optical switch using another electro-optical effect or acousto-optical effect or a prism is deflected by an electromagnet. The present invention can be applied to any optical switch such as a mechanical optical switch.

Although the WDM coupler is used as the light separating means, the present invention can be applied to the case where a deflection controller and a polarization splitter are used as the light separating means. In that case, the main signal is TE-polarized, and the optical signal for transmitting the OAM information is polarization-multiplexed and transmitted using TM-polarization, each block is connected by a polarization-maintaining fiber, and only the TM-polarized light is extracted to OAM. get information. As the polarization controller, a device that applies pressure to the fiber to change the polarization can be used, and as the polarization splitter, LiNbO ₃ , for example, can be realized by using a crystal having such birefringence.

An embodiment of the 54th invention will be described with reference to FIG.

FIG. 20 is a block diagram showing an embodiment of the present invention. In FIG. 20, 2036 is an optical network node (optical network device). 2001, 2
002, ..., 2008, 2009, 2010, ...
Reference numeral 2016 denotes an optical transmission line that transmits the main signal light using light with a wavelength of 1.31 μm and the OAM signal light using light with a wavelength of 1.55 μm. Reference numeral 2035 is an optical switch circuit network (optical functional circuit means). Optical switch network 2035
As the optical switch circuit network 102, the same optical switch circuit network 102 as that used in the first embodiment can be used.
The main signal light is switched as it is and transmitted to another node. 2025, 2026 ... 2032 is 1.55 μm
Optical receivers capable of receiving light of different wavelengths (m optical receiving means)
Is. Reference numeral 2033 denotes an electric signal selector (selecting means) that selects one output light from the eight input electric signals. Reference numerals 2017, 2018, ..., 2024 denote WDM couplers (m number of light separating means) for separating light having a wavelength of 1.31 μm and light having a wavelength of 1.55 μm from the input light, and having a wavelength of 1.31 μm. The light is output to the optical switch network 2035, and the light having a wavelength of 1.55 μm is connected to the optical receivers 2025 to 2032. Reference numeral 2034 denotes an information processing device (information processing means) for processing OAM information of the optical network, which uses a workstation. The OAM information transmitted in 2001, 2002, ..., 2008 is superimposed on the OAM information in the transmitting node so that the same content is transmitted. 2029 is
Optical network node. The OAM information transmitted to 2001 to 2008 has the same contents, and is not information unique to each optical transmission line such as a command to the node.
The AM information and the OAM information of the optical transmission lines 2001 to 2008 are time-division multiplexed.

In a system in which the main signal light is transmitted as an optical signal having a wavelength of 1.31 μm and the OAM signal is transmitted as an optical signal having a wavelength of 1.55 μm, WDM couplers 2017 to 20
It is possible to use 24 to extract only the OAM signal with a wavelength of 1.55 μm. The respective OAM signal lights extracted from the respective optical transmission lines are input to the optical receivers 2025 to 2032. The OAM signals received by the optical receivers 2025 to 2032 are selected by the selector 2033,
The information is input to the information processing device 2034, and the information processing device 203
In step 4, the OAM information is processed.

By using such a configuration, it is possible to transmit O to the optical network node through which the main signal light passes as it is.
It becomes possible to transmit AM information. Further, since it is possible to select the optical transmission line for obtaining the OAM information by using the selector 2033, even if a failure occurs in any optical transmission line, the selector 2033 is used to select an optical transmission line in which no failure has occurred. By switching to the transmission path, it is possible to always receive the OAM signal. For example, it is assumed that the selector 2033 is now selecting the OAM signal light from the optical transmission line 2001. When a failure occurs in the optical transmission lines 2001 and 2002, the optical receiver 2026 cannot receive the OAM signal light. However, by switching the selector 2033 so as to select the OAM signal light of the optical transmission line 2008 in which no failure has occurred, the OA
OAM signal light can be obtained from the M optical transmission line 2008.

The present invention is not limited to this embodiment.

For example, the WDM coupler is used as the light separating means, but the present invention can be applied to the case where a deflection controller and a polarization splitter are used as the light separating means. In that case, the main signal is TE-polarized, and the optical signal for transmitting the OAM information is polarization-multiplexed and transmitted using TM-polarization, each block is connected by a polarization-maintaining fiber, and only the TM-polarized light is extracted to OAM. get information. As the polarization controller, a device that applies pressure to the fiber to change the polarized light to control it can be used, and as the polarization splitter, for example, LiNbO ₃ can be realized by using a crystal having birefringence.

In addition, a system in which an OAM signal is superimposed on a subcarrier signal is used, and an optical coupler is used as an optical demultiplexing means.
The present invention can also be applied by using an optical receiver capable of receiving a subcarrier signal as the optical receiving means.

The embodiment of the 55th invention will be described with reference to FIG.

FIG. 21 is a block diagram showing an embodiment of the present invention. In FIG. 21, reference numeral 2129 is an optical network node (optical network device). 2101, 2
002, ..., 2108, 2109, 2110, ...
Reference numeral 2116 denotes an optical transmission line, which transmits the main signal light by using light having a wavelength of 1.31 μm and transmits the L and OAM signal light by using light having a wavelength of 1.55 μm. 2128 is an optical switch circuit network (optical functional circuit means). Optical switch network 2128
For example, the optical switch circuit network 102 used in the first embodiment of the present invention can be used. The main signal light is switched as it is and transmitted to another node. Reference numeral 2125 denotes an optical branching device (optical branching device) that branches an optical signal input to the input end into eight and outputs the optical signal, and three-stage one-input two-output optical branching device using a directional coupler using a quartz optical waveguide. A 1-input 8-output optical branching device configured by connection can be used. 211
Reference numerals 7, 2118 ... 2124 denote directional coupling type optical couplers (m number of light superimposing means) for coupling the input light with an equal coupling ratio, and here, the input from the output end of the optical switch network 2128. It is used as a coupler for the light and the input light from the output end of the optical branching device 2125. 2126 is 1.55μ
It is an optical transmitter (optical transmitting means) that transmits light having a wavelength of m. Reference numeral 2127 is an information processing device (information processing means) for processing OAM information of the optical network, which uses a workstation. The OAM information transmitted through 2109, 2110, ..., 2124 is superposed on the OAM information at the transmitting node so that the same content is transmitted. 2129 is
Optical network node. The OAM information transmitted to 2109 to 2124 includes OAM information that is not peculiar to each optical transmission line, such as a command to a node, and 2109 to
The OAM information of each optical transmission line 2116 is time-division multiplexed.

OA output from the information processing device 2127
The M signal is input to the optical transmitter 2126 having a wavelength of 1.55 μm and converted into an optical signal. The OAM signal light is branched by the optical branching device 2125, and the optical couplers 2117 to 212.
4 is used to superimpose the main signal light of 1.31 μm. 1.
Main signal light with a wavelength of 31 μm and OA with a wavelength of 1.55 μm
The optical signal superposed with the M signal light is transmitted from each optical transmission line 2109 to
It is input to 2116.

By using such a configuration, it becomes possible to transmit OAM information from the optical network node through which the main signal light passes as it is. The node transmitting the optical signal is the node 1 used in the embodiment of the 53rd invention.
By using 929, OAM information can be obtained. Its operation is described in detail in the embodiment of the 53rd invention. Further, since information about all eight optical transmission lines and OAM information of the optical network are transmitted on all eight optical transmission lines and transmitted, in the case where a failure occurs in any optical transmission line. Also receiving OAM at node 1929
By switching the optical transmission line for obtaining the signal light to the optical transmission line in which no failure has occurred, it is possible to always receive the OAM signal. Further, when the optical branching device 2125 is not used, the optical transmitter 2126 must be prepared for the optical transmission line (8 in the case of the embodiment), but since the optical branching device is used, You only need one transmitter,
The number of optical transmitters to be used can be reduced, resulting in cost reduction.

The present invention is not limited to this embodiment.

For example, in the embodiment, as the optical branching means (optical branching device 2125), the optical branching device using the directional coupler of the optical waveguide made of quartz is used, but the directivity of other waveguides such as LiNbO ₃ is used. The present invention can also be applied by using a bond. Also,
The present invention can be realized by using other optical branching methods such as Y branching of a waveguide and fusion of fibers without using directional coupling.

Although an optical signal having a wavelength of 1.31 μm and an optical signal having a wavelength of 1.55 μm are used for the main signal light and the OAM signal light, respectively, if the respective transmission and switching are possible, other wavelengths are used. The present invention can be applied by using a combination of

Although the optical coupler is used as the light superimposing means, the present invention can be applied even if the WDM coupler is used for superimposing.

Further, in the optical couplers 2117 to 2124, the main signal light kept in the TE polarization and the O kept in the TM polarization.
Optical polarization multiplexing with AM signal light is performed and transmitted to another node. At the node to which this optical signal is transmitted, only the OAM signal light is separated using a polarization splitter, and OAM signal light is separated.
The present invention can also be applied by obtaining information.

An embodiment of the 56th invention will be described with reference to FIG.

FIG. 22 is a block diagram showing an embodiment of the present invention. In FIG. 22, reference numeral 2200 represents an optical network node (optical network device). 2201, 2
202, ..., 2208, 2209, 2210, ...
Reference numeral 2216 denotes an optical transmission path, which transmits the main signal light using light having a wavelength of 1.31 μm and the OAM signal light using light having a wavelength of 1.55 μm. 2235 is an optical switch circuit network (optical functional circuit means). Optical switch network 2235
As the above, the same optical switch circuit network as the optical switch circuit network 102 used in the embodiment of the first invention can be used.
The main signal light is switched as it is and transmitted to another node. 2225, 2226 ... 2232 is 1.55 μm
This is an optical transmitter (m number of optical transmission means) that transmits light of the wavelength. Reference numeral 2233 is an electric signal branching unit (branching means) that branches one input electric signal into eight. 2217, 2
218 ... 2224 input the two input lights 1: 1
Is a directional coupling type optical coupler which outputs the optical signals from the optical switching network 2235 and the optical signals from the output ends of the optical transmitters 2225 to 2232 (m number of optical couplers). Light superimposing means). With this optical coupler, the main signal light with a wavelength of 1.31 μm and 1.55
OAM signal light with a wavelength of μm is superimposed. Reference numeral 2234 denotes an information processing device (information processing means) for processing OAM information of the optical network, which uses a workstation. 2201
2208 is time-division multiplexed with OAM information that is not information unique to each optical transmission line, such as a command for a node, and OAM information 2201 to 2208 of each optical transmission line.

OA output from the information processing device 2234
The M signal includes eight optical transmitters 222 having a wavelength of 1.55 μm.
5 to 2232 and converted into an optical signal. These OAM signal lights are superposed on the main signal lights of 1.31 μm by using the optical couplers 2217 to 2224. 1.31μ
The optical signal in which the main signal light having a wavelength of m and the OAM signal light having a wavelength of 1.55 μm are superimposed on each of the optical transmission lines 2209 to 221.
6 is input.

By using such a configuration, it becomes possible to transmit OAM information from the optical network node through which the main signal light passes as it is. The node transmitting the optical signal is the node 1 used in the embodiment of the 53rd invention.
By using 929, OAM information can be obtained. Its operation is described in detail in the embodiment of the 53rd invention. Further, since information about all eight optical transmission lines and OAM information of the optical network are transmitted on all eight optical transmission lines and transmitted, in the case where a failure occurs in any optical transmission line. Also, the OAM signal can always be received by switching the optical transmission line for obtaining the OAM signal light on the receiving node side to the optical transmission line in which no failure has occurred.

The present invention is not limited to this embodiment.

For example, although the optical coupler is used as the light superimposing means, the present invention can be applied even if the WDM coupler is used for superimposing.

Further, although an optical signal having a wavelength of 1.31 μm was used for the main signal light and an optical signal having a wavelength of 1.55 μm was used for the OAM signal light, other wavelengths can be used as long as respective transmission and switching are possible. The present invention can be applied by using a combination of

The embodiment of the 57th invention will be described with reference to FIG.

FIG. 23 is a block diagram showing an embodiment of the present invention. In FIG. 23, 2346 is an optical network node (optical network device). 2301-2
Reference numerals 308 and 2309 to 2316 denote optical transmission lines that transmit the main signal light using light having a wavelength of 1.31 μm and the OAM signal light using light having a wavelength of 1.55 μm. 2344 is an optical switch circuit network (optical functional circuit means). As the optical switch network 2344, the same optical switch network 102 as that used in the first embodiment of the invention can be used. Reference numeral 2342 denotes an optical selector (selection unit) that selects one output light from the eight input lights, and a 1 × 8 optical switch configured by connecting three 1 × 2 optical switches in three stages can be used. As an optical switch, LiNbO ₃
An optical switch utilizing the electro-optical effect of can be used. 2317 to 2324 are 1.3 from the input light.
A WDM coupler (m light separating means) for separating light having a wavelength of 1 μm and light having a wavelength of 1.55 μm.
Light having a wavelength of μm is output to the optical switch network 2344, and light having a wavelength of 1.55 μm is output to the optical selector 2342. Numerals 2325 to 2332 are directional coupling type optical couplers (m number of light superimposing means) which couple two input lights with a coupling ratio of 1: 1 and output, and here, the light of the optical switch circuit network 2344. Signal and optical splitter 2
It is used as an optical coupler with the optical signal from the output end of 341. 2343 is an optical receiver (optical receiving means) capable of receiving light with a wavelength of 1.55 μm. Reference numeral 2345 denotes an information processing device (information processing means) for processing OAM information of the optical network, which uses a workstation. 2340 is 1.
Optical transmitter (optical transmitting means) for transmitting light having a wavelength of 55 μm
Is. Reference numeral 2341 denotes an optical branching device (optical branching unit) that branches an optical signal input to an input end into eight and outputs the optical signal, and three-stage one-input two-output optical brancher using a directional coupler using a quartz optical waveguide. A 1-input 8-output optical branching device configured by connection can be used. The OAM information output from the information processing device 2345 is time-division multiplexed with OAM information that is not information unique to each optical transmission line, such as a command for a node, and OAM information of each optical transmission line 2309 to 2316.

OA output from the information processing device 2345
The M signal is input to the optical transmitter 2346 having a wavelength of 1.55 μm and converted into an optical signal. This OAM signal light is branched into eight by the optical branching device 2341, and the optical couplers 2325-2
332 is used to superimpose the main signal light of 1.31 μm.
The optical signal in which the main signal light having a wavelength of 1.31 μm and the OAM signal light having a wavelength of 1.55 μm are superposed on each optical transmission line 230.
9 to 2316.

By using such a configuration, it is possible to transmit OAM information from the optical network node through which the main signal light passes as it is. In terms of transmission, since the same OAM signal light is sent to a plurality of optical transmission lines, even if a failure occurs in any of the optical transmission lines, the optical transmission that obtains the OAM signal light at the receiving node side By switching the path to an optical transmission path in which no failure has occurred, the OAM signal can always be transmitted to another node. If the optical branching device 2341 is not used, the optical transmitter 2341 must be prepared for the optical transmission line (8 in the case of the embodiment).
Since the optical branching device is used, only one optical transmitter is required, and the number of optical transmitters to be used can be reduced, resulting in cost reduction. In addition, since the optical selector 2342 can be used to select the optical transmission path for obtaining the OAM information regarding the reception side, even if a failure occurs in any of the optical transmission paths, the optical selector 2342 fails. By switching to an optical transmission line in which no OAM signal is generated, the OAM signal can be always received. For example,
Now, the optical selector 2342 is the OA from the optical transmission line 2301.
It is assumed that M signal light is selected. Optical transmission lines 2301 and 2
When a failure occurs in 302, the optical receiver 2343 cannot receive the OAM signal light. However, the OAM signal light can be obtained from the OAM optical transmission line 2308 by switching the optical selector 2342 so as to select the OAM signal light of the optical transmission line 2308 in which no failure has occurred. Also, the optical selector 23
If 42 is not used, it is necessary to prepare optical receivers 2343 for the optical transmission lines (eight in the case of the embodiment), but since the configuration selected by the optical selector is used, the number of optical receivers is reduced. Only one is required, and the number of optical receivers used can be reduced, resulting in cost reduction.

The present invention is not limited to this embodiment.

For example, in the embodiment, as the optical branching means (optical branching device 2341), the optical branching device using the directional coupler of the optical waveguide made of quartz is used, but the directional property of other waveguides such as LiNbO ₃ is used. The present invention can also be applied by using a bond. Also,
The present invention can be realized by using other optical branching methods such as Y branching of a waveguide and fusion of fibers without using directional coupling.

Although an optical signal having a wavelength of 1.31 μm was used for the main signal light and an optical signal having a wavelength of 1.55 μm was used for the OAM signal light, other wavelengths can be used as long as they can be transmitted or switched. The present invention can be applied by using a combination of

Although the optical coupler is used as the light superimposing means, the present invention can be applied even if the WDM coupler is used for superimposing.

In the embodiment, the LiNbO ₃ optical selector is used as the selection means (optical selector 1925), but an optical switch using another electro-optical effect or acousto-optical effect or a prism is deflected by an electromagnet. The present invention can be applied to any optical switch such as a mechanical optical switch.

Although the WDM coupler is used as the light separating means, the present invention can be applied to the case where a deflection controller and a polarization splitter are used as the light separating means. In that case, the main signal is TE-polarized, and the optical signal for transmitting the OAM information is polarization-multiplexed and transmitted using TM-polarization, each block is connected by a polarization-maintaining fiber, and only the TM-polarized light is extracted to OAM. get information. As the polarization controller, a device that applies pressure to the fiber to change the polarization can be used, and as the polarization splitter, LiNbO ₃ , for example, can be realized by using a crystal having such birefringence.

The 58th embodiment of the present invention will be described with reference to FIG. FIG. 24 is a block diagram showing an embodiment of the present invention. In FIG. 24, 2446 is an optical network node (optical network device). 2433
˜2440 is an optical receiver (m optical receiving means) 244
1 is an electric selector (selection means). In FIG. 23 showing the 57th embodiment, instead of using the optical selector 2342 and the optical receiver 2343, the optical receivers 2433-2
440 (m light receiving means) and electrical selector 2441
By using the (selection means), the node 2446 which is the embodiment as shown in FIG. 24 can be configured. The configuration using these eight optical receivers and electrical selectors is
This is similar to the description of the embodiment of the 54th invention. The remaining part has been described in the 57th embodiment.

The 59th embodiment of the present invention will be described with reference to FIG. FIG. 25 is a block diagram showing an embodiment of the present invention. In FIG. 25, 2546 is an optical network node (optical network device). 2533 ~
2540 is an optical transmitter (m number of optical transmission means), and 2541 is an electric branching device (branching means). In FIG. 23 showing the 57th embodiment, an optical splitter 2341 and an optical transmitter 234 are shown.
Instead of using 0 and 0, optical transmitters 2533-2540
By using (m number of optical transmission means) and the electric branching device 2541 (branching means), an embodiment as shown in FIG. 25 can be constructed. The configuration using these eight optical transmitters and one branching device is the same as the description of the embodiment of the 56th invention. The remaining part has been described in the 57th embodiment.

The embodiment of the 60th invention will be described with reference to FIG. FIG. 26 is a block diagram showing an embodiment of the present invention. In FIG. 26, 2646 is an optical network node (optical network device). 2633 ~
2640 is an optical transmitter, and 2641 is an electric branching device.
Referring to FIG. 24 showing the 58th embodiment, the optical splitter 2341 is shown.
Instead of using the optical transmitter 2340 and the optical transmitter 2340,
33 to 2640 (m number of optical transmitting means) and electric branching device 2
By using 641 (branching means), an embodiment as shown in FIG. 26 can be constructed. The configuration using these eight optical transmitters and one branching device is the same as the description of the embodiment of the 56th invention. No. 58 for the rest
The above-mentioned example has been described.

An embodiment of the 61st invention will be described with reference to FIG.

FIG. 27 is a block diagram showing an embodiment of the present invention. As shown in FIG. 27, the node 2 shown in the embodiment of the 55th invention is used as the first optical network device.
129 can be used. As the second optical network device, the node 192 shown in the embodiment of the 53rd invention
9 can be used. The main signal light is the node 212.
9. At node 1929, the optical signal is passed as it is without being photoelectrically converted. An optical signal having a wavelength of 1.31 μm can be used as the optical signal having a wavelength belonging to the first group, and a wavelength having a wavelength of 1.55 μm can be used as a wavelength belonging to the second group.

The OAM information from the information processing device 2127 is input to the optical transmitter 2126 and converted into an optical signal having a wavelength of 1.55 μm. The optical signal is input to the optical branching device 2125 and branched into eight. The branched OAM signal lights are input to the optical couplers 2117 to 2124, respectively.
It is superimposed with the main signal light having a wavelength of 31 μm. Node 192
The optical signal arriving at 9 is the WDM coupler 1917-19
The main signal light having a wavelength of 1.31 μm is input to the optical switch network 1928, and the OAM signal light having a wavelength of 1.55 μm is input to the optical selector 1925.
The optical selector 1925 selects one OAM signal light and inputs it to the optical receiver 1926. It is converted into an electric signal by the optical receiver 1926 and input to the information processing device 1927. In this way, it becomes possible to transmit OAM information at a node that passes an optical signal as it is.

The present invention is not limited to this example.

For example, in the embodiment, the optical signal of the optical transmitter 2126 is branched by using the optical branching device 2125. However, the electrical OAM signal before being input to the optical transmitter 2126 is branched by the electrical branching device. With 8 and each of the branched signals
The optical present invention can be applied even when inputting to each optical transmitter to generate eight OAM signal lights.

For example, in the embodiment, in the second optical network device, the OAM signal light is selected by using the optical selector, but all the optical receivers are used by using the optical receivers. The present invention can also be applied to a configuration in which the OAM signal light is received and the received signal is selected by an electrical selector.

An example of the 62nd invention will be described with reference to FIG.

FIG. 28 is a block diagram showing an embodiment of the present invention. As shown in FIG. 28, in the configuration of FIG. 27 used in the embodiment of the 61st invention, an optical selector 1925 is used instead of using the optical branching device 2125 in the node 2129.
, And a configuration using an optical splitter 2125 instead of using the optical selector 1925 in the node 1929 can be used. Reference numeral 2829 denotes an optical network node (first optical network device), and reference numeral 2830 denotes an optical network node (second optical network device). A wavelength of 1.31 μm can be used as the wavelength belonging to the first group, and a wavelength of 1.55 μm can be used as the wavelength belonging to the second group.

At the node 2829, the information processing device 2
The OAM information from 127 is input to the optical transmitter 2126 and converted into an optical signal having a wavelength of 1.55 μm. The optical signal is input to the optical selector 1925. The optical selector 1925 selects an optical transmission path for transmitting the OAM signal light, inputs it to any one of the optical couplers 2117 to 2124, and superimposes it on the main signal light having a wavelength of 1.31 μm. The optical signal arriving at the node 2830 is sent to the WDM coupler 19
17-1925, the main signal light with a wavelength of 1.31 μm is input to the optical switch network 1928, and 1.55
The OAM signal light having a wavelength of μm passes through the optical branching device 2125, is converted into an electric signal by the optical receiver 1926, and is input to the information processing device 1927. In this way, it becomes possible to transmit OAM information at a node that passes an optical signal as it is.

The present invention is not limited to this example.

For example, in the embodiment, the optical signal of the optical transmitter 2126 is selected by using the optical selector 1925, but the electric OAM before being input to the optical transmitter 2126 is used.
Select the optical transmission line that sends the signal with the electrical selector
The present invention can be applied even if the AM signal is input to the optical transmitter connected to the selected optical transmission line to transmit the OAM signal light.

An embodiment of the 63rd invention will be described with reference to FIG. 27 showing an embodiment of the 61st invention. FIG. 27
FIG. 3 is a block diagram showing an embodiment of the present invention. FIG. 27
In this case, as the optical selector 1925, for example, 25 ms
An ec having a control mechanism that switches the selection target in order is used. At the sending node 2129,
20 msec as a signal input to the optical transmitter 2126
OAM information for each different optical transmission line is prepared, and the time required for switching the optical selector and framing (5 m
sec) is inserted between each OAM information, and the node 192
9 is sent. The node 1929 inserts a fiber delay line immediately before being input to the optical selector in order to synchronize the time-division-multiplexed OAM information from each optical transmission line with the switching timing of the optical selector.
It is assumed that the delay amount is adjusted so that the OAM information time-division multiplexed at 9 can be separated and received. Then, the transmitting node 2129 transmits the OAM signal light for transmitting the OAM information of the other optical transmission line at the cycle of 25 msec to the receiving node 19
Also in No. 27, the OAM information of each optical transmission line can be obtained by switching the optical selector 1925 at a cycle of 25 msec.

By using such a method, it is possible to transmit OAM information on all optical transmission lines,
Further, by observing the received light power of the OAM signal light of each optical transmission line, all the optical transmission lines can be monitored.

The present invention is not limited to this embodiment.

For example, although the optical selector 1925 is switched every 25 msec in the embodiment, the frame structure of the OAM signal light generated by the transmitting node 2129 is 30 msec.
If the OAM information of each optical transmission line is loaded for each, the optical selector 1925 switches the optical selector 1925 every 35 msec by combining the time (5 msec) required for switching the optical selector and framing. Therefore, the present invention can be applied.

An embodiment of the 64th invention will be described with reference to FIG. 28 showing an embodiment of the 62nd invention. FIG. 28
FIG. 3 is a block diagram showing an embodiment of the present invention. FIG. 28
In this case, the optical selector 1925 has a control mechanism for switching the target to be selected in order every 25 msec. At the transmitting node 2829, OAM information for different optical transmission lines every 20 msec is prepared as a signal to be input to the optical transmitter 2126, and the time (5 msec) required for switching the optical selector 1925 and framing is set for each OAM information. , And sends it to the node 2830. At the node 2830, in order to synchronize the time division multiplexed OAM information from each optical transmission line with the switching timing of the optical selector 1925, a fiber delay line is inserted immediately before being input to the optical selector 1925, and the transmitting node At 2829, the delay amount is adjusted so that the time-division multiplexed OAM information can be separated and received. Then, the transmitting node 2829 switches the OAM signal light that is sent in a 25 msec cycle and is also switched in the receiving node 2830 in a 25 msec cycle, and the OA of each optical transmission line is changed.
M information can be obtained.

By using such a method, it is possible to transmit OAM information on all optical transmission lines,
Further, by observing the received light power of the OAM signal light of each optical transmission line, all the optical transmission lines can be monitored.

The present invention is not limited to this embodiment.

For example, although the optical selector 1925 is switched every 25 msec in the embodiment, the frame structure of the OAM signal light generated by the transmitting node 2829 is 30 msec.
If the OAM information of each optical transmission line is loaded for each time, the optical selector 1925 switches the optical selector 1925 every 35 msec by incorporating the time (5 msec) required for switching the optical selector 1925 and framing. Therefore, the present invention can be applied.

FIG. 27 shows an embodiment of the sixty-fifth invention.
This will be described with reference to FIG. FIG. 27 is a block diagram showing an embodiment of the present invention, and FIG. 29 is a diagram showing a flowchart relating to the present invention.

In FIG. 27 used in the embodiment of the sixty-first invention as the embodiment of the sixty-fifth invention, the information processing apparatus 1 is shown.
927 judges whether or not the optical receiver 1926 is normally receiving (2901 in FIG. 29), and if it is not normally receiving, the OAM signal light from another optical transmission line is received. Then, an instruction to switch the optical selector 1925 is issued to the optical selector 1925 (2902 in FIG. 29). The algorithm is as shown in FIG. By using such a method, it is possible to perform OAM corresponding to an optical transmission line failure even in a node that passes an optical signal as it is.

The present invention is not limited to this embodiment.

For example, in the embodiment, the optical branching device 2125 and the optical transmitter 2126 are used in FIG.
The present invention can also be applied by using a branching device and a system in which eight optical transmitters are connected to the output ends of the eight branching devices.

FIG. 29 shows an embodiment of the sixty-sixth invention.
This will be described with reference to FIG. 29 is a diagram showing a flowchart relating to the present invention, and FIG. 30 is a block diagram showing an embodiment of the present invention.

FIG. 30 is a block diagram of the optical transmitter 28 in FIG.
31, optical coupler 2832, optical transmission line 2832, WDM
A coupler 2833 and an optical receiver 2834 are added, and this system can be applied to the 66th invention. The WDM coupler 2833 outputs an optical signal having a wavelength of 1.31 μm toward the optical switch network 2128, and 1.
It is connected so as to output light having a wavelength of 55 μm to the optical receiver 2834. When transmitting OAM information from the node 2830 to the node 2829, the OAM signal from the information processing device 1927 is converted into an optical signal by the optical transmitter 2831,
The WDM coupler 2832 superimposes the main signal light having a wavelength of 1.31 μm and the OAM signal light having a wavelength of 1.55 μm. The superimposed optical signal is input to the optical transmission line 2832 and transmitted to the node 2829. At the node 2829, input to the WDM coupler 2833, O of 1.55 μm
The optical receiver 2834 receives the AM signal light and transmits the OAM information to the information processing device 2127. In this way, an OAM line from the node 2830 to the node 2829 is constructed.

The operation of the present invention will be described with reference to the flowchart of FIG. In FIG. 30, 1927
Determines whether the optical receiver 1926 in FIG. 30 is normally receiving (2901 in FIG. 29), and if not receiving normally, the OAM line from the node 2830 to the node 2829 is used, A command for switching the optical selector 1925 to receive the OAM signal light from another optical transmission line is issued to the optical selector 1925 (290 in FIG. 29).
2) Do so. If the optical transmission line 1926 has normally received, the process returns to start (2900).

The present invention is not limited to this embodiment.

For example, in the embodiment, the optical selector 1925 and the optical transmitter 2126 are used in FIG. 28, but an electric selector and a system in which eight optical transmitters are connected to the electric selector may be used. The present invention can be applied.

The 67th embodiment of the present invention will be described with reference to FIGS. 31 and 32.

FIG. 31 is a block diagram showing a first embodiment of the present invention. As an embodiment of the 67th invention, FIG.
19 used as an embodiment of the 53rd invention.
A modified node configuration of can be used. In FIG. 31, 3129 represents an optical network node. Reference numerals 3109 to 3116 denote optical receivers (m optical signal determination means) for determining the state of an optical signal. Here, since only disconnection detection is performed, a simple optical receiver that monitors only optical power is used. Can be used. 3101 to 310
Reference numeral 8 denotes an optical coupler (m second light separating means) that outputs power after splitting the power at 5:95 when light is input. Here, an optical power of about 5% of the input light is obtained. The output end is connected to the optical receivers 3109 to 3116, and the output end capable of obtaining an optical power of about 95% of the input light is connected to the information processing device 1927. 1917 to 1924 is 1.3
WDM for separating 1 μm wavelength and 1.55 μm wavelength
1.31 μm with coupler (m first light separating means)
Output the light of the wavelength to the optical switch network 1928,
Light having a wavelength of 1.55 μm is used for optical couplers 3101 to 310
Output to 8.

In the configuration of FIG. 19 which is the embodiment of the fifty-third invention, since any optical signal is selected by using the optical selector 1925, the state of each optical signal transmitted through the optical transmission lines 191-1908 is determined. I could not observe it. However, by using the configuration as shown in FIG. 31, the optical signals transmitted through the optical transmission lines 1901 to 1908 before being input to the optical selector are partially branched, and the optical receivers 3109 to 3116 are divided.
, And the state of OAM signal light transmitted through each optical transmission line 1901 to 1908 (whether or not it is normally received) can be observed. In the case of a failure such as disconnection of the optical transmission line, the reception state of the main signal light and the reception state of the OAM signal light are substantially proportional to each other. The optical transmission line can be observed, and the disconnection of the optical transmission line can be detected.

The present invention is not limited to this embodiment.

For example, although a simple optical receiver for detecting only the optical power is used as the optical signal determining means for determining the state of the optical signal, the present invention can be used even if an optical receiver capable of observing the bit error rate is used. Is applicable.

Next, the second embodiment of the present invention will be described with reference to FIG.

FIG. 32 is a block diagram showing the second embodiment of the present invention. In FIG. 32, reference numeral 3229 represents an optical network node (optical network device). 32 shows
The position of the optical switch network 1958 and the WDM couplers 1917 to 1924 in FIG. 31 of the 67th embodiment of the present invention.
The parts connected below are reversed. Only the arrangement is different from that of FIG. 31, and the other detailed description is the same as that of the first embodiment.

FIG. 33 shows an embodiment of the 68th invention.
This will be described with reference to FIG. FIG. 33 is a block diagram showing an embodiment of the present invention, and FIG. 34 shows an example of a transfer frame of OAM signal light transmitted and received by the node of the present invention in order to realize the present invention.

FIG. 33 is a modification of the configuration of the second embodiment of the first invention. It shows the optical receiver 101 (optical receiving means) and the information processing device 105 (information processing means) in FIG. A time division demultiplexing device 3301 (information separating means), a packet processing device 3302 (second group protocol processing means), and a bit information processing device 3303 (first group protocol processing means) are inserted between them. The time division demultiplexing device 3301 outputs the byte whose relative position and value from the framing byte of the bit is OAM information to the bit information processing device 3303, and the byte which is performing packet transfer of the packet processing device 3302. Output to The packet processing device 3302 uses the X. 25 based on the protocol (second group protocol). The bit information processing device 3303 recognizes the position and value of the bit on the transfer frame time axis, and stores the value in a variable used for OAM information processing (first group protocol). As the time division demultiplexing device 3301, the bit information processing device 3303, and the packet processing device 3302, an SDH optical signal terminating device (optical line terminator) is used.
Devices included in rs and Multiplexers) can be used.

As in the second embodiment of the first invention, a system is used in which the main signal is 1.31 μm and the OAM signal light is 1.55 μm. An SDH transmission frame can be used as the transmission frame of the main signal light having a wavelength of 1.31 μm. As the transmission frame of the OAM signal light having the wavelength of 1.55 μm, the transmission frame shown in FIG. 34 can be used. In FIG. 34, 3400 represents a transfer frame, and the horizontal axis represents time. A framing byte 3401 has a fixed-pattern bit string such as 11010110 for recognizing the start of a frame. Reference numeral 3402 is a byte that represents the state of the optical transmission line or transfers a switching command, and the position and value of the bit on the frame means (hereinafter referred to as bit information).
have. If the first bit is 1, the optical transmission line is normal, and if it is 0, the optical transmission line is cut off. In addition, information is represented by a combination of the second bit and the third bit. For example, if the second bit is 0 and the third bit is 1, then a command representing an instruction to switch from the currently used optical transmission line to the standby optical transmission line is used. A byte 3402 having bit information stores information on an optical transmission line, an instruction for switching an optical switch circuit network, and the like, which are necessary for network failure recovery that can be performed by simple control. Reference numeral 3403 is an area for transferring a packet. Packets according to 25 protocols are loaded. The line using the packet is used as a line for exchanging information that requires complicated control information exchange, OAM information that is not a command to an adjacent node, and non-emergency OAM information. For example, it is used as a line for transmitting and receiving an instruction to switch the optical switch circuit network by remote control and change the path through which an optical signal passes.

On the optical transmission line 103, an optical signal in which the main signal light and the OAM signal light are superimposed is transmitted. Node 33
Upon arrival at 00, WDM coupler 204
The main signal light having a wavelength of 1 μm is transmitted to the optical switch network 102, and the OAM signal light having a wavelength of 1.55 μm is input to the optical receiver 101. The optical signal input to the optical receiver 101 is converted into an electrical signal, the framing byte 3401 shown in FIG. 34 is detected, and frame synchronization is performed. Then, the OAM signal is input to the time division demultiplexer 3301 and the byte having bit information is transferred to the bit information processor 33.
03, and the byte which is performing packet transfer is output to the packet processing device 3302. The packet processor 3302 processes the protocol (X.25) used in this packet transmission to obtain OAM information,
The OAM information is delivered to the information processing device 105. In the bit information processing device 3303, “the bit position and value are OAM
The content of the first bit of the "byte which is information" is stored in the variable X1, the content of the second bit is stored in the variable X2, the content of the third bit is stored in the variable X3, and
Hand over AM information.

By using the optical network node configuration as shown in FIG. 33, the node 33 that passes an optical signal as it is.
At 00, an OAM signal can be obtained. FIG. 34
Since a frame structure such as
More efficient OAM can be performed by separating bit information, which is AM information, and packet information, which is not so urgent, to obtain OAM information. For example, in the case of a relatively simple failure recovery such as a failure recovery from the active optical transmission path to the standby optical transmission path that passes through the same path as the active optical transmission path, the failure recovery is performed only by the bit information of the byte 3402. The information is transmitted only by the bit position and its value, and the OAM information transfer speed is high because the protocol does not pass through the protocol that takes time to process the packet communication.
Faster disaster recovery is possible.

The present invention is not limited to this embodiment.

For example, in the embodiment, the packet processing device 3302 is used as the first group of protocol processing means, but the present invention is applicable even if a device for assembling and processing a frame relay cell or an ATM cell is used. it can.

Further, in the embodiment, the bit information processing device 3303 is used as the protocol processing means of the second group, but the present invention can be realized even if a device for assembling and processing a frame relay cell or an ATM cell is used. Applicable.

In the embodiment, the optical switch network 102 is also provided.
The output terminal of the WDM coupler 204 is connected to the input terminal of the WD, but the WD is connected to the output terminal of the optical switch network 102.
Even if the configuration in which the input ends of the M coupler 204 are connected is used,
The present invention can be applied only by changing the positions where the optical functional circuit means and the OAM signal light are superimposed.

FIG. 33 shows an embodiment of the 69th invention.
This will be described with reference to FIG. 33 is a block diagram showing an embodiment of the present invention, and FIG. 34 is an example of a transfer frame of an OAM signal according to the embodiment of the present invention.

A sixty-sixth invention is based on the sixty-eighth invention.
The first group of protocol processing means is limited to the protocol processing means for processing the protocol having the relative position of the bit, the bit value and the combination of the plurality of bits having the operation, management and maintenance information of the network. As the embodiment of the present invention, the embodiment of the 68th invention can be used, and the description is the same as that of the 68th embodiment.

In the present invention, the relative position of the bit from the framing byte, and the value of the bit and the combination of a plurality of bits have the operation, management, and maintenance information of the network, thereby making it complicated. Since OAM information can be transferred quickly because protocol processing is not performed, OAM that requires rapid response such as failure recovery can be performed quickly.
OAM that does not require a sudden response can be transferred using a protocol with higher functionality, and more efficient OAM can be performed at a node through which the main signal passes as an optical signal.

About the embodiment of the 70th invention, FIG.
This will be described with reference to FIG. FIG. 35 is a block diagram showing an embodiment of the present invention, and FIG. 34 is an example of a transfer frame of a signal transferred at the node.

In FIG. 35, 3500 is an optical network node (optical network device). FIG. 35 is a modification of FIG. 3 showing the configuration of the third embodiment of the invention, and is arranged between the optical transmitter 301 (optical transmitting means) and the information processing device 305 (information processing means) in FIG. , Time division multiplexer 3
501 (information superimposing means), packet processing device 3502
(Protocol processing means of second group) and bit information processing device 3503 (protocol processing means of first group) are inserted and can be used as an embodiment of the present invention. Third
Similarly to the embodiment of the invention described above, an optical signal having a wavelength of 1.31 μm is transmitted as the main signal through the optical transmission line, and the optical signal is 1.55 μm.
An optical signal having a wavelength of m is used as the OAM signal light. The packet processing device 3502 uses the X. 25 based on the protocol (second group protocol). The bit information processing device 3303 performs a process of storing a value in a variable used for OAM information processing (first group protocol). As the time division multiplexing apparatus 3501, the bit information processing apparatus 3503, and the packet processing apparatus 3502, SDH optical signal terminators (optical line terminators) are used.
and the devices included in Multiplexers) can be used. Similar to the second embodiment of the first invention, the main signal is 1.31 μm and the OAM signal light is 1.55 μm.
A system transmitting light with a wavelength of m is used. 1.31 μm
An SDH transmission frame can be used as the transmission frame of the main signal light of the wavelength. As the transmission frame of the OAM signal light having the wavelength of 1.55 μm, the transmission frame shown in FIG. 34 can be used. The detailed description is
This has been described in the 68th embodiment of the invention.

Of the OAM information generated by the information processing device 305, the information to be transferred in the form of bits or bytes is input to the bit information processing device 3503, and the information to be transferred in packets is input to the packet processing device 3502. The bit information processing device 3503 converts the information entered by a certain variable into a bit string, and stores the value in the relative position on the time axis where the information should enter (first group protocol). The packet processing device 3502 divides the input signal and converts it into packets. Signals from the bit information processing device 3503 and the packet processing device 3502 are input to the time division multiplexing device 3501 and framing bytes 3401 used for framing at the receiving node are added to form a transfer frame 3400 shown in FIG. . This transfer frame 3400 is input to the optical transmitter 301 and is 1.55 μm
Is converted into an optical signal of wavelength. This OAM signal light is W
The optical switch network 30 is input to the DM coupler 304.
The main signal light having a wavelength of 1.31 μm output from the optical fiber 2 is superposed and transmitted to the optical transmission line 303. OA like this
For the optical signal in which the M signal light and the main signal light are superposed, the OAM signal light can be obtained at the node by using the node shown in FIG. 33 which is the embodiment of the 68th invention.

By using the optical network node configuration as shown in FIG. 35, the node 35 that passes an optical signal as it is.
At 00, an OAM signal can be sent to another node. Since the frame structure as shown in FIG. 34 is used, more efficient OAM can be performed by separating bit information, which is OAM information that is urgent, and packet information that is not so urgent, to obtain OAM information. it can. For example, in the case of a relatively simple failure recovery such as a failure recovery from the active optical transmission path to the standby optical transmission path that passes through the same path as the active optical transmission path, the failure recovery is performed only by the bit information of the byte 3402. Since the information is transmitted only by the bit position and its value, and the protocol does not pass through a protocol that takes a long time to process the packet communication, the transfer speed of the OAM information is high and faster failure recovery is possible.

The present invention is not limited to this embodiment.

For example, in the embodiment, the packet processing device 3502 is used as the first group of protocol processing means, but the present invention can be applied even if a device for assembling and processing a frame relay cell or an ATM cell is used. it can.

Further, in the embodiment, the bit information processing device 3503 is used as the protocol processing means of the second group, but the present invention is also applicable to the case where a device for assembling and processing a frame relay cell or an ATM cell is used. Applicable.

Further, in the embodiment, the optical switch network 302 is used.
The input end of the optical coupler 304 is connected to the output end of the optical coupler 304, but the optical functional circuit means and the OAM can be used even if the output end of the optical coupler 304 is connected to the input end of the optical switch network 302. The present invention can be applied because the positions where the signal lights are superimposed are simply changed.

As for the embodiment of the 71st invention, FIG.
This will be described with reference to FIG.

FIG. 35 is a block diagram showing an embodiment of the present invention, and FIG. 34 is an example of a transfer frame of an OAM signal used for carrying out the present invention. In a seventy-first invention based on the seventy-th invention, the relative position of the bit from the framing byte, the bit value and the combination of a plurality of bits are used as the first group of protocol processing means for operating and managing the network. The present invention is limited to the protocol processing means for processing the protocol having the maintenance information, and the embodiment of the present invention is the same as the description of the embodiment of the 70th invention.

In the present invention, the relative position of the bit from the framing byte and the value of the bit or the combination of a plurality of bits have the operation, management, and maintenance information of the network, thereby making it complicated. Since OAM information can be transferred quickly because protocol processing is not performed, OAM that requires rapid response such as failure recovery can be performed quickly.
OAM that does not require a sudden response can be transferred using a protocol with higher functionality, and more efficient OAM can be performed at a node through which the main signal passes as an optical signal.

The embodiment of the 72nd invention will be described with reference to FIGS. 36 and 37. FIG. 36 is a block diagram showing an embodiment of the present invention, and FIG. 37 is an example of a transfer frame of an OAM signal transferred to the node to implement the present invention.

In FIG. 36, 3600 is an optical network node (optical network device). FIG. 36 shows a configuration of FIG. 19 used in the embodiment of the fifty-third invention, in which a time division demultiplexing device 3601 (information separating means) is provided between the optical receiver 1926 and the information processing device 1927 (information processing means). ), Packet processing device 3302 (first group protocol processing means), and bit information processing devices 3603 to 3610.
A configuration in which the (second group protocol processing means) is connected can be used. Reference numeral 3620 is a “selection optical receiving means” including an optical receiver 1926 and an optical selector 1925. The bit information processing devices 3603 to 3610 perform processing of storing values in variables used for OAM information processing (second group protocol). The time division demultiplexing device 3601 converts the byte having bit information into bit information processing devices 3603 to 361.
It outputs to the 0 and outputs to the packet processing device 3602 the byte which is carrying out the packet transfer. The packet processing device 3602 uses the X. 25 based on the protocol (first group protocol). Time division demultiplexer 36
01, the bit information processing devices 3603 to 3610, and the packet processing device 3302 are SDH optical signal terminators (Optical Line Terminators).
and the devices included in Multiplexers) can be used.

As in the 53rd embodiment of the invention, a system is used in which the main signal is 1.31 μm and the OAM signal light is 1.55 μm. An SDH transmission frame can be used as the transmission frame of the main signal light having a wavelength of 1.31 μm. As the transmission frame of the OAM signal light having the wavelength of 1.55 μm, the transmission frame shown in FIG. 37 can be used. In FIG. 37, 3700 represents a transfer frame, and the horizontal axis represents time. A framing byte 3709 has a fixed pattern bit string such as 11010110 for recognizing the start of a frame. Reference numerals 3701 to 3708 are bytes that represent the states of the respective optical transmission lines 1901 to 1908.
The OAM information about the byte 3701 corresponds to the byte 3701, and the optical transmission line 1902 stores the byte 3702. ． ． And each OAM information corresponds to each optical transmission line. The information held by each of the bytes 3701 to 3708 is the same as the “byte whose bit value and position is OAM information” 3402 in the transfer frame of FIG. 34 used in the description of the 68th embodiment. The packet transfer byte 3710 is the same as the packet transfer byte 3403 described in the 68th embodiment of the present invention. Packet communication according to the 25 protocol is performed.

The operation until the OAM signal light is input to the optical receiver 1925 is similar to that of the operation of the embodiment of the 53rd invention. The optical signal input to the optical receiver 1926 is converted into an electric signal, and the framing signal shown in FIG.
Byte 3709 is detected and frame synchronization is performed. After that, the OAM signal is input to the time division demultiplexer 3601, and the byte having the bit information is transferred to the bit information processor 361.
03 to 3610, and outputs the byte for which packet transfer is being performed to the packet processing device 3302.
The packet processing device 3302 processes the protocol (X.25) used in this packet transmission to obtain OAM information, and delivers the OAM information to the information processing device 105. In the bit information processing devices 3603 to 3610, the content of the first bit of the byte 3701 is stored in the variable X11,
Store the contents of the second bit in variable X12 ,. ． ． , The content of the first bit of byte 3702 is stored in variable X21 ,. ． ． , The content of the 8th bit of the byte 3708 is stored in the variable X88, and the OAM information of each optical transmission line is delivered to the information processing apparatus 1927.

By using the optical network node configuration as shown in FIG. 36, the node 36 that passes an optical signal as it is.
At 00, an OAM signal can be obtained. FIG. 37
Since a frame structure such as
More efficient OAM can be performed by separating bit information, which is AM information, and packet information, which is not so urgent, to obtain OAM information. For example, in the case of a relatively simple failure recovery such as a failure recovery from the working optical transmission path to the protection optical transmission path that is the same as the working optical transmission path, the failure recovery is performed only by the bit information of the byte 3701. Since the information is transmitted only by the value of the bit and the protocol that takes a long time to process the packet communication is not passed, the transfer rate of the OAM information is high and faster failure recovery is possible. Further, even if the OAM signal light that has passed through any one of the optical transmission lines is selected using the optical selector 1925, the OAM information necessary for the optical transmission lines 1901-1908 can always be obtained, and the main signal system is OAM line failure recovery can be performed independently.

The present invention is not limited to this embodiment.

For example, in the embodiment, the packet processing device 3302 is used as the first group of protocol processing means, but the present invention is applicable even if a device for assembling and processing a frame relay cell or an ATM cell is used. it can.

Further, in the embodiment, the bit information processing devices 3603 to 3610 are used as the protocol processing means of the second group, but even if a device for assembling and processing a frame relay cell or an ATM cell is used, The invention is applicable.

Also, in the embodiment, the optical switch network 192
The optical switch circuit network 192 has a configuration in which the output terminals of the WDM couplers 1917 to 1924 are connected to the input terminal of 7.
Even when the configuration in which the input ends of the WDM couplers 1917 to 1924 are connected to the output end of 7 is used, the optical functional circuit means and the OAM
The present invention can be applied because the positions where the signal lights are superimposed are simply changed.

FIG. 36 shows an embodiment of the 73rd invention.
This will be described with reference to FIG.

FIG. 36 is a block diagram showing an embodiment of the present invention, and FIG. 37 is an example of a transfer frame of an OAM signal transferred to the node for realizing the present invention.
A 73rd aspect of the present invention is the protocol processing means according to the 72nd aspect, wherein, as the protocol processing means of the second group, a bit itself or a combination of a plurality of bits itself processes a protocol having operation, management and maintenance information of the network. However, the present invention is not limited to this.
This is similar to the description of the embodiment of the 72nd invention.

In the present invention, the bit itself or the combination of a plurality of bits itself has the operation, management and maintenance information of the network.
OA that requires rapid response such as failure recovery because it enables fast transfer of OAM information without complicated protocol processing.
OAM that does M quickly and does not require so sudden action
Can be transferred using a protocol with higher functionality, and more efficient OAM can be performed at a node through which a main signal passes as an optical signal.

FIG. 37 shows an embodiment of the 74th invention.
This will be described with reference to FIG. FIG. 38 is a block diagram showing an embodiment of the present invention, and FIG. 37 is a transfer frame of OAM signal light transferred through the node to realize the present invention.

FIG. 38 shows an optical transmitter 2126 and an information processing means 212 in FIG. 21 showing an embodiment of the 55th invention.
7 (information processing means), a time division multiplexer 3801
(Information superimposing means), packet processing device 3802 (first group protocol processing means), bit information processing device 3803
3810 (second group protocol processing means) is inserted, and the configuration of FIG. 38 can be used as an embodiment of the 74th invention. 3811 is an optical transmitter 212
6 and an optical branching device 2125. The OAM information regarding the optical transmission line 2109 of FIG. 38 is input to the bit information processing device 3803, and byte 3 of FIG.
701, and OAM information regarding the optical transmission line 2110 is input to the bit information processing device 3804, and the byte 3702 is input.
Generate ,. ． ． , OAM information about the optical transmission line 2116 is input to the bit information processing device 3810, and the byte 370 is input.
8 (second group protocol). In each byte, the relative position and value of a certain bit on the time axis have meaning. The OAM information transferred by packet communication is input to the packet processing device 3802 and the packet transfer byte 3710 is generated (first group protocol). In the time division multiplexer 3801, these bytes are time division multiplexed to generate the transfer frame 3700 of FIG. After this, the OAM signal light is transmitted to other nodes in the same manner as described in the embodiment of the 55th invention. At the node receiving this signal, the OAM information can be obtained by using the configuration of FIG. 36 used in the embodiment of the 72nd invention.

By using the optical network node configuration as shown in FIG. 38, the node 38 that passes an optical signal as it is.
At 00, an OAM signal can be sent to another node. Since the frame structure as shown in FIG. 37 is used, more efficient OAM can be performed by separating the bit information that is the OAM information that is urgent and the packet information that is not so urgent to obtain the OAM information. it can. For example, in the case of a relatively simple failure recovery such as a failure recovery from the working optical transmission path to the protection optical transmission path that is the same as the working optical transmission path, the failure recovery is performed only by the bit information of the byte 3701. Since the information is transmitted only by the value of the bit and the protocol that takes time to process the packet communication is not passed, the transfer rate of the OAM information is high,
Faster disaster recovery is possible. In addition, the optical transmission line 2109
Since the OAM signal having the OAM information regarding all the optical transmission lines is sent to all the optical transmission lines 2116 to 2116, no matter which optical transmission line a failure occurs, the OAM information receiving side can switch the OAM information. By doing so, it is possible to obtain OAM information regarding all optical transmission lines.

The present invention is not limited to this embodiment.

For example, in the embodiment, the packet processing device 3502 is used as the protocol processing means of the first group, but the present invention is applicable even if a device for assembling and processing a frame relay cell or an ATM cell is used. it can.

Further, in the embodiment, the bit information processing device 3503 is used as the protocol processing means of the second group. However, the present invention can be realized even if a device for assembling and processing a frame relay cell or an ATM cell is used. Applicable.

Further, in the embodiment, the optical switch network 302 is used.
The input end of the optical coupler 304 is connected to the output end of the optical coupler 304, but the optical functional circuit means and the OAM can be used even if the output end of the optical coupler 304 is connected to the input end of the optical switch network 302. The present invention can be applied because the positions where the signal lights are superimposed are simply changed.

FIG. 37 shows the embodiment of the 75th invention.
This will be described with reference to FIG.

FIG. 38 is a block diagram showing an embodiment of the present invention, and FIG. 37 is a transfer frame of OAM signal light transferred through the node to realize the present invention. A 75th aspect of the invention is the 74th aspect of the invention, wherein the protocol processing means of the second group is such that the relative position of the bits on the time axis and the value of the bit or the value of the combination of a plurality of bits are used for the operation of the network. The embodiment of the present invention is the same as the description of the 74th embodiment of the present invention.

In the present invention, the relative position of the bits on the time axis and the value of the bit or the value obtained by combining a plurality of bits have the operation, management, and maintenance information of the network. OAM information can be transferred quickly because complicated protocol processing is not performed, and OAM that requires urgent response such as failure recovery can be performed quickly. OAM that does not require urgent response requires a protocol with higher functionality. OAM can be transferred by using the optical signal, and more efficient OAM can be performed at a node through which the main signal passes as an optical signal.

The embodiment of the 76th invention will be described with reference to FIG.

FIG. 39 is a block diagram showing an embodiment of the present invention. In FIG. 39, 3900 represents an optical network node (optical network device). Reference numeral 102 is an optical switch circuit network 102 (optical functional circuit means) used in the embodiment of the first invention. 3901, 3902 and 3903 are
Optical transmission lines connected to other nodes, and optical signals using SDH transfer frames are transmitted to these optical transmission lines. Reference numeral 101 denotes an optical receiver (optical receiving means), which checks whether or not the optical level of the optical signal passing through the optical transmission line 3901 has dropped. Reference numeral 104 denotes an optical coupler (light separating means), which can be the same as that used in the embodiment of the first invention. Reference numeral 105 denotes an information processing device (information processing means) which can be the same as that used in the first embodiment of the present invention. 3904 is a main signal generator (signal output device)
Then, the signal of the payload of the SDH transfer frame is output. The OAM information of the optical network is carried in the empty bytes of the SOH output from the information processing device 105, which can be realized by modifying the SDH device. Reference numeral 3905 denotes a time division multiplexing device (signal superimposing unit) that superimposes an SOH (Section Overhead) signal received from the information processing device 105 and an output signal from the main signal generator 3904, and an SDH device can be used. Reference numeral 3906 is an optical transmitter (optical transmitting means), which is an SDH terminating device (optical line).
Terminators and Multiplex
ers) transmission unit can be used.

After the optical signal transmitted from the optical transmission line 3901 is input to the optical coupler 104, most of the optical signal passes through the optical switch circuit network 102 and remains as the optical signal.
02 to the other nodes. Conventionally, it was not possible to send and receive OAM information at a node that passes through an optical signal as it is. It will be possible. The optical receiver 3907 determines that the optical signal transmitted through the optical transmission line 3901 is a normal signal when the optical signal has a power equal to or higher than a certain threshold value, and transfers that fact to the information processing apparatus 105. . Information processing device 10
In 5, the SDH SOH is generated, but the OAM information peculiar to the optical network can be placed in an unused byte in the SOH of the SDH frame. Main signal generator 390
4 generates the payload in the SDH frame, which is multiplexed with the SOH from the information processing device 105 in the time division multiplexing device 3905 to generate the SDH transfer frame. The generated SDH transfer frame is transmitted by the optical transmitter 3906.
Is converted into an optical signal by and transmitted to another node.

The optical transmission line 39 is passed through the optical transmission line 3901.
In the node 3900, the optical signal going to 02 is switched as it is by the optical switch circuit network 102 and transmitted to another node. Therefore, in the conventional configuration, it is impossible to send and receive the OAM signal. However, by using the node configuration of FIG. 39, the optical transmission line 3901 and the node 3900
It becomes possible to send and receive OAM information regarding.

The present invention is not limited to this embodiment.

For example, although the SDH transfer frame is used in the embodiment, the present invention can be applied to the case of using SONET transfer frame.

Further, in the embodiment, the optical separating means (optical coupler 104) is replaced with the optical functional circuit means (optical switch circuit network 102).
The optical switch network 102 was placed before input to the
The present invention can be applied even if it is arranged after the output of.

Further, in the embodiment, the optical transmission means (optical transmitter 3
906) is an optical switch circuit network 102 (optical functional circuit means)
Although the present invention can be applied to the optical transmission line 3903 directly connected to another node without passing through the optical switch circuit network 102, the present invention can be applied.

The embodiment of the 77th invention will be described with reference to FIG.

FIG. 40 is a block diagram showing an embodiment of the present invention. In FIG. 40, reference numeral 4000 represents an optical network node (optical network device). , 102 are optical switch circuit networks (optical functional circuit means), and those used in the first embodiment of the invention can be used. 4001,
Reference numerals 4002, 4003, and 4004 denote optical transmission lines connected to other nodes, and optical signals using SDH transfer frames are transmitted to these optical transmission lines. 4005
Is an optical receiver (optical receiving means), and is an SDH terminating device (Optical Line Terminators).
A receiver of and multiplexers) can be used. A main signal processing device (signal input means) 4007 processes the SDH payload signal. 40
Reference numeral 06 is a time division demultiplexer (signal demultiplexing means) for SDH
The SOH and the payload are separated, L is output to the information processing device 105, and the payload is output to the main signal processing device 4007. Reference numeral 105 denotes an information processing device (information processing means) which can be the same as that used in the first embodiment of the present invention. A main signal generator (signal output means) 3904 outputs a payload signal of an SDH transfer frame. The empty bytes of the SOH output from the information processing device 105 include the OA of the optical network.
M information is included and can be realized by modifying the SDH device. Reference numeral 3905 indicates an SOH (Section Over) received from the information processing apparatus 105.
It is a time division multiplexing device (signal superimposing means) that superimposes an output signal from the main signal generator 3904, and an SDH device can be used. Reference numeral 3906 denotes an optical transmitter (optical transmitting means), which is an SDH terminating device (Op
mechanical Line Terminators an
d multiplexers) transmitter can be used.

OA of optical network in SOH of SDH
In the portion where the M information is put, a packet is put and X. Communication is performed according to the 25 protocols. At the node 4000, if the received packet is not the OAM information addressed to the own node,
The received OAM information is transferred to another node as it is, and if it is addressed to the own node, the received OAM information is processed.
In this way, even if there is an optical signal (optical signal passing through the optical transmission lines 4001 and 4003) that is switched as it is and passes through the node, the optical transmission line 40 that is electrically terminated.
OAM information can be sent and received by using SOH of optical signals 02 and 4004.

The present invention is not limited to this embodiment.

For example, although the SDH transfer frame is used as the transfer frame of the optical signal to be transmitted, the present invention can be applied to the case where another transfer frame such as SONET is also used.

In the embodiment, the optical receiving means (optical receiver 4
005) as an optical functional circuit means (optical switch circuit network 102)
Although it is connected to the output end of the above, the present invention can be applied by directly connecting to the optical transmission line 4002. Further, although the optical transmitter 3906 is connected to the input end of the optical switch network 102, the present invention can be applied even if it is directly connected to the optical transmission line 4004.

An embodiment of the 78th invention will be described with reference to FIG.

The 78th invention limits the optical function circuit means of the 77th invention to an optical switch circuit network, and the node configuration of FIG. 40 can be used as an embodiment. As the optical switch circuit network, the optical switch circuit network 102 described in the embodiment of the first invention can be used. The optical signal transmitted from the optical transmission line 4002 is transmitted to the node 400.
0 is terminated by the optical receiver 4005, and the node 4000 is an electrical termination point. The optical transmission line 4004 outputs a signal converted from an electrical signal to an optical signal in the optical transmitter 3906, and the node 4000 electrically terminates the optical signal transmitted through the optical transmission line 4004. It is a point. The description of the operation, action, etc. is similar to the description of the 77th embodiment of the invention. By using the optical switch circuit network as the optical functional circuit means, the optical transmission line to be received by the optical receiver 4005 can be switched to another optical transmission line other than the optical transmission line 4002. Even if a failure occurs in the path 4002, the OAM information can be received by switching to receive the optical signal of another optical transmission path.

As described above, according to the embodiments, from the first invention to the 78th invention
The present invention has been described in detail, but these inventions are not limited to the embodiments described above.

For example, although there is an invention using an optical branching device or a WDM coupler as the light separating means in the embodiments, the present invention can be applied even if a polarization controller and a polarization splitter are used as the light separating means. In that case, the main signal is TE deflection, O
An optical signal for transmitting AM information is polarization-multiplexed using TM polarization and transmitted, and each block is connected by a polarization maintaining fiber.
OAM information is obtained by extracting only M-polarized light. As the polarization controller, it is possible to use a device that applies pressure to the fiber to change the polarization, and as the polarization splitter,
For example, LiNbO ₃ can be realized by using a crystal having such birefringence.

Also, the light separating means (WDM coupler 402)
As for the embodiment using the WDM coupler that separates the wavelengths of 1.31 μm and 1.55 μm, even if the main signal light is not 1.31 μm and the supervisory signal light is not 1.55 μm, the main signal light is The present invention can also be applied by using a WDM coupler capable of separating the wavelengths used for the OAM signal light and the OAM signal light.

The optical coupler used as the optical separating means or the optical superimposing means has a branching ratio of 95: 5 or 1: 1, but the branching ratio does not affect the main signal system and the optical reception If the value is branched so that it can be received by means, 95: 5
The present invention can be applied even if it is not 1: 1.

In the embodiment, the optical switch circuit network is used as the optical function circuit means, but the optical branching device, the star coupler, the W
The present invention can be applied by using a passive optical element such as a DM coupler or an isolator. Also, as the optical functional circuit means,
The present invention can be applied even if an optical switch circuit network having optical components such as an optical branching device and a WDM coupler is used. Further, the present invention can be applied even when the optical function circuit means includes an optical receiver or an optical transmitter for a main signal as the optical function circuit means. The present invention can be applied even if an optical amplifier such as an Er-doped fiber or a semiconductor optical enhancer is used as the optical functional circuit means. Further, as the optical function circuit means, "a device comprising an optical signal terminating device and an electrical switch circuit network means" comprising an optical signal terminating device and a switch circuit network means (switch, cross-connect device) for switching electrical signals. The present invention can be applied by using The present invention can also be applied to a case where a device including an optical signal terminating device and a repeater for regenerating and repeating an electric signal is used as the optical functional circuit means. The present invention can be applied even if an optical circuit network in which an input end and an output end are simply connected by an optical fiber is used as the optical functional circuit means. Also, as the optical function circuit means, even if the optical function circuit means in which the light superimposing means, the light separating means or the other optical function circuit means is connected in the preceding stage and the latter stage of the other optical function circuit means, the present invention is not Applicable. Further, the present invention can be applied even if a configuration including a wavelength division multiplexing optical switch circuit network or a time division multiplexing switch circuit network is used as the optical function circuit means.

As the optical switch used in the optical switch circuit network, an optical switch made of LiNbO ₃ was used. However, any optical switch such as a mechanical optical switch, a semiconductor optical switch, or a quartz optical switch may be used. The present invention can also be applied by using the configured optical switch network.

Although the optical switch circuit network 102 as described in the first embodiment of the invention is used as the optical switch circuit network, a switch circuit network having an arbitrary number of input / output ports and having an arbitrary switch network configuration is used. Even if used, the present invention can be applied.

Although the workstation is used as the information processing means, the present invention can be applied to any personal computer, DSP (digital signal processor) or the like as long as it can process the OAM information of the optical network.

In the fifty-third to sixty-seventh inventions, a 1 × 8 optical selector or an electric selector is used as the selecting means, but a 1 × m (m is an integer of 2 or more) optical selector. The present invention can be applied by using an electric selector.

In the embodiments from the 53rd invention to the 67th invention, an 8-branch optical branching device is used as the optical branching means.
The present invention can be applied by using an optical branching device for branching m (m is an integer of 2 or more).

In the embodiments from the 53rd invention to the 67th invention, an eight-branch electric branching device is used as the branching means, but an m (m is an integer of 2 or more) branching device may be used. ,
The present invention can be applied.

[0490]

According to the present invention, when the main signal light passes through as it is, the operation of the network
Management and maintenance information can be exchanged. By superimposing the OAM signal light on the main signal light passing therethrough and by separating it, OAM information can be transmitted to another node,
Efficient network operation, management and maintenance can be performed. Further, it is not necessary to separately prepare an optical transmission line for continuous use, management and maintenance of the optical network, and it is possible to economically operate, manage and maintain the network.
Further, in the node, it is possible to monitor the optical signal, the optical transmission line, and the optical function circuit means, and it is possible to efficiently use, manage and maintain the network.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a first invention and the like.

FIG. 2 is a block diagram showing an embodiment of the second invention and the like.

FIG. 3 is a block diagram showing an embodiment of the third invention and the like.

FIG. 4 is a block diagram showing an embodiment of a fourth invention and the like.

FIG. 5 is a block diagram showing an embodiment of the fifth invention and the like.

FIG. 6 is a block diagram showing an embodiment of a sixth invention and the like.

FIG. 7 is a block diagram showing an embodiment of the fifteenth invention and the like.

FIG. 8 is a block diagram showing an embodiment of the seventeenth invention and the like.

FIG. 9 is a block diagram showing an embodiment of the nineteenth invention and the like.

FIG. 10 is a block diagram showing an embodiment of the twentieth invention and the like.

FIG. 11 is a block diagram showing an embodiment of the twenty-ninth invention and the like.

FIG. 12 is a block diagram showing an embodiment of the thirty-seventh invention and the like.

FIG. 13 is a block diagram showing an embodiment of the thirty-eighth invention and the like.

FIG. 14 is a block diagram showing an embodiment of the forty-first invention and the like.

FIG. 15 is a block diagram showing an embodiment of the 43rd invention and the like.

FIG. 16 is a block diagram showing an embodiment of the forty-sixth invention and the like.

FIG. 17 is a block diagram showing one embodiment of the 47th invention and the like.

FIG. 18 is a block diagram showing an embodiment of the forty-eighth invention and the like.

FIG. 19 is a block diagram showing one embodiment of the 53rd invention and the like.

FIG. 20 is a block diagram showing an embodiment of the 54th invention and the like.

FIG. 21 is a block diagram showing one embodiment of the 55th invention and the like.

FIG. 22 is a block diagram showing an embodiment of the 56th invention and the like.

FIG. 23 is a block diagram showing one embodiment of the 57th invention and the like.

FIG. 24 is a block diagram showing an embodiment of the 58th invention and the like.

FIG. 25 is a block diagram showing an embodiment of the 59th invention and the like.

FIG. 26 is a block diagram showing an embodiment of the 60th invention and the like.

FIG. 27 is a block diagram showing an embodiment of the 61st invention and the like.

FIG. 28 is a block diagram showing an embodiment of the 62nd invention and the like.

FIG. 29 is a flowchart relating to an embodiment of the sixty-fifth invention and the like.

FIG. 30 is a block diagram showing an example of a sixty-sixth invention and the like.

FIG. 31 is a block diagram showing a first embodiment of the 67th invention and the like.

FIG. 32 is a block diagram showing a second embodiment of the 67th invention and the like.

FIG. 33 is a block diagram showing an embodiment of the 68th invention and the like.

FIG. 34 is an example of a transfer frame of an OAM signal according to an embodiment such as the 68th invention.

FIG. 35 is a block diagram showing an embodiment of the 70th invention and the like.

FIG. 36 is a block diagram showing an embodiment of the 72nd invention and the like.

FIG. 37 is an example of a transfer frame of an OAM signal according to an embodiment of the 72nd invention and the like.

FIG. 38 is a block diagram showing an embodiment of the 74th invention and the like.

FIG. 39 is a block diagram showing an embodiment of the 76th invention and the like.

FIG. 40 is a block diagram showing an embodiment of the 77th invention and the like.

FIG. 41 is a block diagram showing a conventional optical cross-connect system node.

FIG. 42 is a block diagram showing a configuration example of an optical switch circuit network.

[Explanation of symbols]

101 optical receiver (optical receiving means) 102 optical switch circuit network (optical functional circuit means) 103 optical transmission path 104 optical coupler (optical separation means) 105 information processing device (information processing means) 106 optical transmission path 107 optical network node ( Optical network device) 204 WDM coupler (optical separating means) 301 Optical transmitter (optical transmitting means) 304 Optical coupler (optical superposing means) 402 WDM coupler (optical separating means) 404 Optical coupler (optical superposing means) 502 WDM coupler (optical) Separation means 504 Optical coupler (light superposition means) 602 WDM coupler (light separation means) 604 Optical coupler (light superposition means) 702 Optical coupler (light superposition means) 704 WDM coupler (light separation means) 804 WDM coupler (light separation means) ) 904 Optical coupler (light superimposing means) 1002 WDM cup (Optical demultiplexing means) 1004 Optical coupler (optical superimposing means) 1102 WDM coupler (first optical demultiplexing means) 1104 Optical coupler (second optical superimposing means) 1110 Optical coupler (first optical superimposing means) 1111 WDM coupler ( Second optical demultiplexing means) 1202 Optical coupler 1209 Optical modulator 1210 Modulator 1221 Optical network node (first optical network device) 1222 Optical network node (second optical network device) 1321 Optical network node (first 1 optical network device) 1322 optical network node (second optical network device) 1401 WDM coupler (first optical separating unit) 1402 optical coupler (third optical separating unit) 1403 optical coupler (first optical superimposing unit) Means) 1405 WDM coupler (second light separating means) 1406 Optical coupler (second light superimposing means) 1501 WDM coupler (first light separating means) 1502 Optical coupler (third light separating means) 1503 Optical coupler (first light superimposing means) 1505 WDM coupler (second) 1506 Optical coupler (second light superimposing means) 1601 Modulator (modulator means) 1604 Optical modulator (optical signal modulator means) 1701 Modulator (modulator means) 1704 Optical modulator (optical signal) Modulator means) 1804 Optical coupler (light superimposing means) 1917 to 1924 WDM coupler (m light separating means) 1925 Optical selector (selecting means) 2017 to 2024 WDM coupler (m light separating means) 2025 to 2032 Optical receiving Device (m light receiving means) 2033 Selector (selecting means) 2117 to 2124 Optical coupler (m light weights) Tatami means) 2125 Optical branching device (optical branching means) 2217 to 2224 Optical coupler (m light superimposing means) 2225 to 2232 Optical transmitter (m optical transmitting means) 2233 Branching device (branching means) 2317 to 2324 WDM Coupler (m light separating means) 2325 to 2332 Optical coupler (m light overlapping means) 2341 Optical branching device (optical branching means) 2342 Optical selector (selecting means) 2433 to 2440 Optical receiver (m optical receiving means) Means) 2441 Selector (selection means) 2541 Brancher (branching means) 2553 to 2540 Optical transmitter (m optical transmitting means) 2633 to 2640 Optical transmitter (m optical transmitting means) 2641 Brancher (branching means) 2830 Second optical network devices 3101 to 3108 Optical couplers (m second optical separating means) 3109 to 3116 Optical receivers Device (m number of optical signal determining means) 3301 Time division demultiplexing device (information separating means) 3302 Packet processing device (second group protocol processing means) 3303 bit information processing device (first group protocol processing means) 3400 Transfer Frame 3401 Framing byte 3402 Byte 3403 in which the position and value of bit are OAM information bytes for packet transfer 3501 Time division multiplexing device (information superimposing means) 3502 Packet processing device (second group protocol processing means) 3503 bit information processing device (First group protocol processing means) 3601 Time division demultiplexing apparatus (information separating means) 3302 Packet processing apparatus (first group protocol processing means) 3603-3610 bits Information processing apparatus (second group protocol processing means) 3801 Time division multiplexing device (information superimposing hand ) 3802 packet processing device (first group protocol processing means) 3803-3810 bit information processing device (second group protocol processing means) 3905 time division multiplexer (signal superposition means) 4006 time division demultiplexer (signal separation means) ) 4101 optical switch network 4201 8 × 8 matrix optical switch

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI H04Q 3/52

Claims (8)

(57) [Claims] Claim: What is claimed is: 1. An optical functional circuit means, which is a target of operation, management and maintenance of an optical network, an input end, a first output end and a second end.
Output terminal of the second input node is connected to an optical transmission line to which the input terminal is connected to another node and the first output terminal is connected to the optical function circuit means, or the first output terminal is connected to another node. Is connected to an optical transmission line connected to the optical transmission line and the input end is connected to the optical function circuit means to separate the light input to the input end into the first output end and the second output end. Operation, management, and maintenance of a first network that has an output optical separation unit, an optical reception unit, an input end, a first output end, and a second output end, and that communicates in advance according to the first group protocol. When a signal in which a signal having information and a signal having operation, management, and maintenance information of a second network that communicates according to a second group protocol are time-division-multiplexed is input to an input end, the first network Signals with operational, management, and maintenance information Information separating means for outputting information to the first output end and information of a signal having operation, management and maintenance information of the second network to the second output end, and the protocol of the first group. Operation of the optical network having a first group of protocol processing means for performing processing, a second group of protocol processing means for performing protocol processing of the second group, and a first input end and a second input end. An information processing means for processing information on management / maintenance, a second output end of the light separating means is connected to an input end of the light receiving means, and an output end of the light receiving means is connected to the information separating means. Connected, a first output terminal of the information separating means is connected to an input terminal of the protocol processing means of the first group, and a second output terminal of the information separating means is an input of the protocol processing means of the second group. Connected to the end, said first The output end of the protocol processing means of is connected to the first input end of the information processing means, and the output end of the protocol processing means of the second group is connected to the second input end of the information processing means. A characteristic optical network device. 2. The signal having operation, management and maintenance information of the first network is a digital signal,
The detailed protocol processing means is a protocol processing means for processing a protocol in which the relative position of bits on the time axis of the digital signal and the value of the bits are operation, management, and maintenance information of the network. The optical network device according to claim 1, which is characterized in that. 3. An optical functional circuit means which is an object of operation / management / maintenance of an optical network, and has a first input end, a second input end and an output end, and the first input end is connected to another node. Connected to an optical transmission line to be connected and the output end is connected to the optical function circuit means, or the output end is connected to an optical transmission line connected to another node and the first input end is the Light superimposing means connected to the optical function circuit means for outputting to the output terminal a superposition of the input light to the first input end and the input light to the second input end, and an optical transmitting means, A first group of protocol processing means for performing a first group of protocol processing; a second group of protocol processing means for performing a second group of protocol processing; a first input end, a second input end and an output end. Operation of the first network that has the communication according to the protocol of the first group A signal having operation, management and maintenance information of a second network which inputs a signal having management and maintenance information to the first input terminal and communicates according to the protocol of the second group, has a signal having the second input terminal. And outputs to the output end a signal in which the signal having the operation, management and maintenance information of the first network and the signal having the operation, management and maintenance information of the second network are time-division multiplexed. And an information processing unit having a first output end and a second output end for processing information on the operation / management / maintenance of the optical network, and a first output of the information processing unit. The end is connected to the input end of the protocol processing means of the first group, the second output end of the information processing means is connected to the input end of the protocol processing means of the second group, and the protocol processing of the first group is performed. The output end of the stage is connected to the first input end of the information superimposing means, and the output end of the protocol processing means of the second group is connected to the second input end of the information superimposing means, An optical network device, wherein an output end is connected to an input end of the optical transmitting means, and an output end of the optical transmitting means is connected to a second input end of the optical superimposing means. 4. The signal having operation, management, and maintenance information of the first network is a digital signal,
The protocol processing means of the group is a protocol processing means for processing a protocol in which the relative position of bits on the time axis of the digital signal and the value of the bits are operation, management and maintenance information of the network. The optical network device according to claim 3, which is characterized in that. 5. An optical functional circuit means which is a target of operation, management and maintenance of an optical network, an input end, a first output end and a second end.
Output terminal of the second input node is connected to an optical transmission line to which the input terminal is connected to another node and the first output terminal is connected to the optical function circuit means, or the first output terminal is connected to another node. Is connected to an optical transmission line connected to the input terminal and the input end is connected to the optical function circuit means, and the light input to the input end is separated and output to the first output end and the second output end. Which has m light separating means, m input terminals and one output terminal, and the optical signal input to one of the m input terminals is electrically A first optical communication unit that has a selection light receiving unit that outputs a signal converted into a signal and an input end and an output end from a first output end to a (m + 1) th output end and that performs communication in advance according to a protocol of the first group. Communicates with signals that carry information on the operation, management, and maintenance of existing networks and protocols of the second group The operation, management, and maintenance information of the first network is input when a signal that is time-division-multiplexed with a signal having the operation, management, and maintenance information of the m second group networks is input to the input terminal. The information of the signal that it has is output to the (m + 1) th output end, and the information of the signal that has the operation, management, and maintenance information of the second group of networks is output from the first output end to the mth output end. Information separating means for outputting respectively, first group protocol processing means for performing the first group protocol processing, m second group protocol processing means for performing the second group protocol processing, and the optical network Information processing means for processing information on operation / management / maintenance of the selected light receiving means, the second output end of the light separating means being connected to the input end of the selecting light receiving means, and the output end of the selecting light receiving means. Is Is connected to the input end of the information separating means, the (m + 1) th output end of the information separating means is connected to the input end of the protocol processing means of the first group, and is connected to the first output end of the information separating means. The m-th output terminal is connected to the input terminals of the m second group protocol processing means, and the output terminal of the first group protocol processing means is connected to the input terminal of the information processing means. An optical network device, wherein the output terminals of the m second group protocol processing means are respectively connected to the input terminals of the information processing means. 6. Operation and management of the second group of networks,
And a signal having maintenance information is a digital signal, and the protocol processing means of the second group is configured so that the relative position of the bit on the time axis of the digital signal and the value of the bit are used for operation, management, and management of the network. 6. The optical network device according to claim 5, which is protocol processing means for processing a protocol that is maintenance information. 7. An optical signal, which has one input end and m output ends and is converted into an optical signal when the signal is input to the input end, outputs m optical signals to the m output ends, respectively. An optical branching / transmitting means for outputting, an optical functional circuit means for operation / management / maintenance of an optical network having a plurality of output terminals, a first input terminal, a second input terminal and an output terminal, and The first input end is connected to an optical transmission line connected to another node and the output end is connected to the optical function circuit means, or the output end is connected to an optical transmission line connected to another node. Further, the first input end is connected to the optical function circuit means, and the input light to the first input end and the input light to the second input end are superimposed and output to the output end m Individual light superimposing means, and first group protocol processing means for performing first group protocol processing It has m second group protocol processing means for performing the second group protocol processing, and has the first input end to the (m + 1) th input end and the output end, and communicates by the first group protocol. The signal having the operation, management and maintenance information of the first network is transmitted to the (m + 1) th signal.
From the first input terminal to the m-th input terminal, the signals having operation, management, and maintenance information of m second-group networks that are input to the input terminals of the second group and communicate according to the second group protocol. And a signal having the operation, management, and maintenance information of the first network and a signal having the operation, management, and maintenance information of the m second group networks are time-division multiplexed. Information superimposing means for outputting to the output end, operation and management of the optical network
And an information processing means for processing information about maintenance, wherein an output terminal of the information processing means is connected to an input terminal of the protocol processing means of the first group and an input terminal of the protocol processing means of the m second groups. The output end of the protocol processing means of the first group is the (m + 1) th of the information superimposing means.
Output terminals of the m second group protocol processing means are respectively connected from the first input terminal to the m-th input terminal of the information superimposing means, and the output terminals of the information superimposing means. Is connected to the input end of the optical branching and transmitting means, and the output end of the optical transmitting means is connected to the second input end of the optical superimposing means, respectively. 8. The operation and management of the second group of networks,
And a signal having maintenance information is a digital signal, and the protocol processing means of the second group is configured so that the relative position of the bit on the time axis of the digital signal and the value of the bit are used for operation, management, and management of the network. 8. The optical network device according to claim 7, wherein the optical network device is protocol processing means for processing a protocol that is maintenance information.